{"id":2608,"date":"2026-09-29T03:42:50","date_gmt":"2026-09-29T10:42:50","guid":{"rendered":"https:\/\/www.five.reviews\/?p=2608"},"modified":"2026-09-29T03:42:51","modified_gmt":"2026-09-29T10:42:51","slug":"use-claude-sonnet-5-5","status":"publish","type":"post","link":"https:\/\/www.five.reviews\/how-to\/use-claude-sonnet-5-5\/","title":{"rendered":"How to Use Claude Sonnet 5.5: Best Settings, Prompts &amp; Workflows"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.anthropic.com\/claude-sonnet-5-5\" target=\"_blank\" rel=\"noreferrer noopener\">Claude Sonnet 5.5<\/a> is powerful, but choosing the model is only the first step. Getting the most from it requires understanding effort levels, crafting precise prompts, controlling scope, and verifying outputs. This guide shows you exactly how to configure and use Sonnet 5.5 for everything from simple questions to complex coding and research work.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Whether you&#8217;re moving from Claude Sonnet 5, trying Sonnet 5.5 for the first time, or building <a href=\"https:\/\/www.five.reviews\/ai-tools\/ai-agents-vs-ai-assistants\/\" target=\"_blank\" rel=\"noreferrer noopener\">agentic workflows<\/a>, the patterns you&#8217;ll learn here apply across the Claude Platform, Claude app, Claude Code, and the Claude API.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>How should you use Claude Sonnet 5.5?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Start with the effort level that matches your workload, not the highest available setting<\/li>\n\n\n\n<li>Use adaptive thinking for reasoning-heavy tasks; use between_tools only when you specifically need to turn off up-front thinking<\/li>\n\n\n\n<li>Give Claude clear scope, completion criteria, and stop conditions to control what it does<\/li>\n\n\n\n<li>Require real verification for coding, not just a confirmation it was done<\/li>\n\n\n\n<li>Use tools for current information, complex visual inputs, and work that requires checking external data<\/li>\n\n\n\n<li>Define the output format explicitly: Markdown, JSON, structured outputs, or tables<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What Is Claude Sonnet 5.5?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Claude Sonnet 5.5 is Anthropic&#8217;s fastest intelligent model, designed for everyday knowledge work, coding, research, and agentic tasks. It trades some reasoning capability compared to Claude Opus 5.5 for significantly faster response times and lower cost, making it the ideal choice for most users and applications.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sonnet 5.5 ships with adaptive thinking enabled by default. This means the model allocates extra computation to harder problems while staying fast on simple questions. You control the balance between thinking depth, speed, and cost with the effort parameter, which you&#8217;ll adjust based on the task at hand.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The model processes text and images, handles up to 1 million tokens of context, and can output up to 128K tokens per response. Its knowledge was trained through June 2026, so for current information, you&#8217;ll want to use search or other tools.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong><em>Read More: <a href=\"https:\/\/www.five.reviews\/how-to\/how-to-use-claude-opus-5-5\/\" target=\"_blank\" rel=\"noreferrer noopener\">How to Use Claude Opus 5.5: Complete Guide to Anthropic&#8217;s New AI Model<\/a><\/em><\/strong><\/h4>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Claude Sonnet 5.5 specifications<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Specification<\/strong><\/td><td><strong>Claude Sonnet 5.5<\/strong><\/td><\/tr><tr><td>Model ID<\/td><td>claude-sonnet-5-5<\/td><\/tr><tr><td>Context window<\/td><td>1M tokens<\/td><\/tr><tr><td>Maximum output<\/td><td>128K tokens<\/td><\/tr><tr><td>Input price<\/td><td>$2\/MTok<\/td><\/tr><tr><td>Output price<\/td><td>$10\/MTok<\/td><\/tr><tr><td>Thinking<\/td><td>Adaptive (default)<\/td><\/tr><tr><td>Claude Platform API default effort<\/td><td>High<\/td><\/tr><tr><td>Claude app\/Claude Code default effort<\/td><td>Medium<\/td><\/tr><tr><td>Knowledge cutoff<\/td><td>June 2026<\/td><\/tr><tr><td>Release date<\/td><td>September 28, 2026<\/td><\/tr><tr><td>Availability<\/td><td>Active (latest)<\/td><\/tr><tr><td>Retirement<\/td><td>Not sooner than September 28, 2027<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How to Use Claude Sonnet 5.5<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.five.reviews\/wp-content\/uploads\/2026\/09\/How-to-use-claude-sonnet-5.5-1024x683.png\" alt=\"\" class=\"wp-image-2610\" srcset=\"https:\/\/www.five.reviews\/wp-content\/uploads\/2026\/09\/How-to-use-claude-sonnet-5.5-1024x683.png 1024w, https:\/\/www.five.reviews\/wp-content\/uploads\/2026\/09\/How-to-use-claude-sonnet-5.5-300x200.png 300w, https:\/\/www.five.reviews\/wp-content\/uploads\/2026\/09\/How-to-use-claude-sonnet-5.5-768x512.png 768w, https:\/\/www.five.reviews\/wp-content\/uploads\/2026\/09\/How-to-use-claude-sonnet-5.5.png 1536w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Here&#8217;s the practical process for setting up and running Sonnet 5.5 effectively.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Step 1. Select Claude Sonnet 5.5<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>On the Claude Platform or the Claude API<\/strong>: Use the model ID claude-sonnet-5-5 when making API calls.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>On Claude.ai<\/strong>: Click the model selector and choose Claude Sonnet 5.5. It&#8217;s the default on the Claude Platform API but appears as an option in the Claude app.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>On Claude Code<\/strong>: The model runs by default and is optimized for coding workflows.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Step 2. Match the effort level to the task<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">There is no universal &#8220;best&#8221; effort level. The right choice depends on your workload.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Effort controls how much Claude Sonnet 5.5 thinks before and while working on your task. Higher effort means more thinking, deeper reasoning, more thorough checking, longer response times, and higher token usage. Lower effort means faster responses and lower cost, but less deliberation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Effort on Sonnet 5.5 is recalibrated compared to Sonnet 5. Anthropic recommends running a fresh test against your own benchmarks rather than assuming your Sonnet 5 setting will work the same way.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Task<\/strong><\/td><td><strong>Starting point<\/strong><\/td><td><strong>Reasoning<\/strong><\/td><\/tr><tr><td>Simple questions<\/td><td>Low<\/td><td>Faster response without sacrificing quality<\/td><\/tr><tr><td>General knowledge work<\/td><td>Medium<\/td><td>Balanced default for everyday use<\/td><\/tr><tr><td>Agentic coding (well-defined tasks)<\/td><td>Medium<\/td><td>Good starting point for multistep work<\/td><\/tr><tr><td>Complex coding or debugging<\/td><td>High<\/td><td>More reasoning and verification<\/td><\/tr><tr><td>Difficult research or reasoning<\/td><td>High<\/td><td>More deliberate processing<\/td><\/tr><tr><td>Latency-sensitive chat<\/td><td>Low or Medium<\/td><td>Faster first-token time<\/td><\/tr><tr><td>Extremely hard or open-ended work<\/td><td>Xhigh or Max<\/td><td>Use only when testing shows a meaningful quality gain<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">This is a practical starting framework, not an Anthropic-prescribed universal rule. Your own evaluations matter most.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Step 3. Give Claude a precise objective<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Structure your prompt to include:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Task<\/strong>: What specifically do you want Claude to do?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Context<\/strong>: What background or constraints does Claude need to know?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Constraints<\/strong>: What should Claude not change, not assume, or not add?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Desired output<\/strong>: What format should the result take?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Scope and stop condition<\/strong>: When should Claude stop working? What completion look like?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Verification method<\/strong>: For important work, how should the output be checked?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Example structure:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;You are a code reviewer. Review the pull request below. Check for security issues, logic errors, and performance problems. Do not refactor the code unless asked. Do not add new features or tests. Stop after you&#8217;ve identified issues and suggested fixes. Format your response as a numbered list of findings with severity levels.&#8221;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Step 4. Tell Claude when to use tools<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tools include web search, code execution, image cropping and zooming, and any other capability you integrate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Claude Sonnet 5.5 sometimes answers from its training knowledge when tool use would catch details that have changed. This matters most for research, support, comparisons, and knowledge work.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If your integration includes search or other tools, add this to your system prompt:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;Use the search tool to check specifics that may have changed since your training, such as what is allowed, required or charged, even when you feel confident. For researched work such as a report or a comparison, gather current sources rather than writing from your training knowledge.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For dense charts and technical drawings, consider giving Claude access to a crop, zoom, or code-execution tool. These tools help Claude read visual inputs markedly more accurately, especially at higher effort levels.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Step 5. Verify important outputs<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Especially for coding, research, calculations, and business-critical work, require real verification instead of Claude just confirming it&#8217;s done.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For coding: Run tests, build the project, or type-check the changes. Don&#8217;t accept a summary without output.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For research: Cross-check facts against sources rather than treating Claude&#8217;s answer as final.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For calculations: Spot-check the math or run the formula independently.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For writing: Have a human editor review the content.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Claude Sonnet 5.5 Settings Explained<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Claude Sonnet 5.5 effort levels<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Effort is your main control for quality, latency, token usage, and cost. The levels range from low to max, and each one affects how the model behaves.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Low effort<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Minimal thinking before responses<\/li>\n\n\n\n<li>Fastest response time<\/li>\n\n\n\n<li>Lowest cost<\/li>\n\n\n\n<li>Best for: simple questions, quick lookups, latency-sensitive chat<\/li>\n\n\n\n<li>Tradeoff: On long <a href=\"https:\/\/www.five.reviews\/ai-tools\/claude-code-vs-codex\/\" target=\"_blank\" rel=\"noreferrer noopener\">agentic coding<\/a> tasks, Claude may check in with you before finishing work it could complete itself<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Medium effort<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Brief thinking and reasoning<\/li>\n\n\n\n<li>Balanced speed and quality<\/li>\n\n\n\n<li>Moderate cost<\/li>\n\n\n\n<li>Best for: everyday knowledge work, general coding tasks, research with clear scope<\/li>\n\n\n\n<li>Default for: Claude app and <a href=\"https:\/\/www.five.reviews\/ai-tools\/claude-code-vs-cursor-comparison\/\" target=\"_blank\" rel=\"noreferrer noopener\">Claude Code<\/a><\/li>\n\n\n\n<li>Tradeoff: Some agentic tasks may pause to ask for confirmation<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>High effort<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Substantial thinking and verification<\/li>\n\n\n\n<li>Deliberate problem-solving<\/li>\n\n\n\n<li>Higher cost and longer response times<\/li>\n\n\n\n<li>Best for: complex coding, difficult research, multistep reasoning<\/li>\n\n\n\n<li>Default for: Claude Platform API<\/li>\n\n\n\n<li>Tradeoff: Longer wait before the first token<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Xhigh and Max effort<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Very deep thinking and thorough review<\/li>\n\n\n\n<li>Longest response time<\/li>\n\n\n\n<li>Highest cost and token usage<\/li>\n\n\n\n<li>Best for: extremely difficult problems where you&#8217;ve measured quality gains<\/li>\n\n\n\n<li>Warning: Reserve these for work where testing shows they&#8217;re worth the cost and latency<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Claude Sonnet 5.5 does not accept temperature, top_p, or top_k settings outside their defaults. Attempting to set these to non-default values returns a 400 error.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>How to choose the right effort level<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ask yourself these questions:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Do I need a fast response? Start with low or medium.<\/li>\n\n\n\n<li>Is this a reasoning-heavy or complex task? Move toward medium or high.<\/li>\n\n\n\n<li>Are mistakes expensive? Use high or xhigh.<\/li>\n\n\n\n<li>Is this agentic coding with multiple steps? Start at medium, move to high for harder work.<\/li>\n\n\n\n<li>Have I tested this workload and found higher effort produces better results? Then use xhigh or max.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>One key adjustment<\/strong>: Set max_tokens with room for both thinking and the output you expect. Thinking counts toward max_tokens even when you don&#8217;t see it. For agentic coding, set max_tokens to 128,000, the model&#8217;s maximum. If you don&#8217;t, Claude may run out of space and produce an incomplete response.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Claude Sonnet 5.5 Adaptive Thinking Explained<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Adaptive thinking is Claude Sonnet 5.5&#8217;s approach to reasoning. The model automatically allocates thinking time based on task difficulty. On simple questions, it skips most thinking and answers quickly. On complex problems, it thinks longer before responding.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You don&#8217;t control adaptive thinking directly in your prompt. Instead, you control the overall effort level, and adaptive thinking adjusts its behavior within that level.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What it does<\/strong>: Before and sometimes during a response, Claude allocates computation to thinking through the problem. With adaptive thinking enabled, this thinking happens whether you ask for it or not.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Why it matters<\/strong>: Better reasoning, especially on multi-step problems. The model works through logic before answering, which reduces errors.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>How it differs from <\/strong><strong>between_tools<\/strong>: Adaptive thinking is the default thinking mode. Claude Sonnet 5.5 accepts between_tools as an alternative that turns off up-front thinking, useful only in specific scenarios. For most work, adaptive thinking is the right choice.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>An important distinction<\/strong>: Asking Claude in your prompt to &#8220;think step-by-step&#8221; or &#8220;think less&#8221; does not produce the same effect as changing the effort level. The effort parameter controls actual computational resource allocation. Prompt instructions affect the output but don&#8217;t change how much the model thinks internally. If you want less thinking, lower the effort level. If you want more, raise it.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What Is Claude Sonnet 5.5 <\/strong><strong>between_tools<\/strong><strong>?<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">between_tools is a specialized thinking mode unique to Sonnet 5.5. It disables up-front thinking and instead lets Claude allocate thinking only between tool calls.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>When it&#8217;s useful<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Agentic workflows where up-front thinking is verbose and unnecessary<\/li>\n\n\n\n<li>Integrations where latency is critical and up-front thinking adds delay<\/li>\n\n\n\n<li>Situations where you want the model to start acting immediately<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>How it works<\/strong>:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Send &#8220;thinking&#8221;: {&#8220;type&#8221;: &#8220;between_tools&#8221;} in your API request. The model skips thinking before its first response and any tool calls, but can still think between tool calls as it works.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Key constraints<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Only accepted at high effort or below. At xhigh or max effort, a request with between_tools returns a 400 error.<\/li>\n\n\n\n<li>When using between_tools, effort cannot change mid-conversation. Per-message effort changes return an error.<\/li>\n\n\n\n<li>For reasoning tasks without tools, use adaptive thinking instead. between_tools with no tools means the model answers without thinking first, which is less accurate on multi-step reasoning.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Why not use it for everything<\/strong>: For reasoning-heavy tasks, up-front thinking improves quality. Turning it off only makes sense if you specifically understand the tradeoff and accept faster latency with potentially lower quality.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How to Write Better Claude Sonnet 5.5 Prompts<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sonnet 5.5 prompts should follow a clear structure and account for its specific behaviors.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Define the goal clearly<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vague: &#8220;Analyze this code.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Better: &#8220;Review this pull request for security vulnerabilities. Ignore style issues. Check for injection risks, unsafe cryptography, and hardcoded secrets. List each finding with severity and a fix.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The better version tells Claude exactly what to look for and what to ignore.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Control Claude&#8217;s initiative and scope<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Sonnet 5.5 can perform additional work on open-ended requests. This is usually helpful but sometimes not what you want.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Example: You ask Claude to fix a bug. At higher effort levels, it might also refactor nearby code, add tests, and improve documentation, even though you only asked for the bug fix.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To control this, add explicit scope instructions:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;When the requested change is complete and tested, stop. Don&#8217;t add features, refactoring, tests, or documentation unless explicitly asked. If you think an improvement would help, mention it at the end instead of doing it.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Or, for tasks where you want Claude to keep working until everything is done:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;Keep working until all the user&#8217;s requested work is complete. Only stop to ask if you can&#8217;t continue without the user or before a risky step. When the work is done and verified, stop and report.&#8221;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Ask for verification<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For coding work especially, require that Claude actually runs tests or builds before claiming a task is done.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;When you change code, run a real check that exercises the change: tests, type-checker, or build. A syntax-only check doesn&#8217;t count. If dependencies aren&#8217;t installed, install them. Only report the change as done if the check passes.&#8221;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Tell Claude when current information requires search<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;For questions about current pricing, availability, policies, or recent events, use search to verify before answering. Training data has a cutoff date and may not reflect changes.&#8221;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Give explicit output requirements<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;Format your response as a JSON object with the fields: title, summary, keyPoints (array), relevance (0-100).&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Or: &#8220;Use Markdown. Include a table comparing the three options. Put code blocks in JavaScript with syntax highlighting.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Explicit format requirements prevent ambiguity and save time parsing responses.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Best Claude Sonnet 5.5 Prompts<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Here are six practical prompt templates for common workflows. Each includes the type of work, recommended effort, the prompt structure, and why it works.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Prompt 1: Coding task with verification<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Best for<\/strong>: Feature implementation, bug fixes, code reviews<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Recommended effort<\/strong>: Medium for well-specified tasks, High for complex changes<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Prompt<\/strong>:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;You are an expert developer. Implement the following feature in [language]:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">[Feature description]<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Requirements:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use [specified patterns or libraries]<\/li>\n\n\n\n<li>Do not refactor existing code unless necessary<\/li>\n\n\n\n<li>Do not add features beyond what&#8217;s requested<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">When the code is complete, run the project&#8217;s test suite. If tests pass, report the change as done with a summary. If tests fail, fix the failures and rerun until they pass. Don&#8217;t move on to anything else.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Why it works<\/strong>: Clear boundaries prevent scope creep. Requiring actual test execution ensures verification, not just confidence.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Prompt 2: Debugging prompt<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Best for<\/strong>: Finding and fixing errors in existing code<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Recommended effort<\/strong>: High<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Prompt<\/strong>:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;I&#8217;m debugging [describe the problem]. Here&#8217;s the error:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">[Error message and stack trace]<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Context:<br>[Relevant code]<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Steps to reproduce:<br>[How to trigger the bug]<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Find the root cause and suggest a fix. Test the fix if possible. Explain why the bug occurred and how the fix prevents it.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Why it works<\/strong>: Providing error context, reproduction steps, and relevant code helps Claude diagnose quickly. High effort ensures thorough analysis.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Prompt 3: Research and comparison prompt<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Best for<\/strong>: Comparing options, gathering current information, building reports<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Recommended effort<\/strong>: Medium to High<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Prompt<\/strong>:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;Research [topic] and compare [specific items]. For each item, find:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Current pricing<\/li>\n\n\n\n<li>Key features<\/li>\n\n\n\n<li>Strengths and weaknesses<\/li>\n\n\n\n<li>Real user feedback<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Use search to verify information. Don&#8217;t rely on training knowledge for current details. Format your response as a table with these columns: [columns], plus a brief summary section below with your recommendation and reasoning.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Why it works<\/strong>: Explicit instruction to search ensures current data. Table format makes comparison scannable. Asking for reasoning adds credibility.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Prompt 4: Long-document analysis prompt<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Best for<\/strong>: Extracting insights from large documents, cross-document comparisons<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Recommended effort<\/strong>: Medium to High<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Prompt<\/strong>:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;Analyze this [document type]. Extract:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Main argument or purpose<\/li>\n\n\n\n<li>Key findings or data points<\/li>\n\n\n\n<li>Critical assumptions<\/li>\n\n\n\n<li>Gaps or weaknesses<\/li>\n\n\n\n<li>Actionable conclusions<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Focus on [specific areas of interest]. Ignore [irrelevant sections]. Format as a structured report with headings and bullet points. Be concise and specific, not general.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Why it works<\/strong>: Structured extraction prevents rambling analysis. Specifying what to focus on and what to ignore controls scope. Large context window means you can paste the full document.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Prompt 5: Writing and editing prompt<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Best for<\/strong>: Drafting content, editing existing work, style refinement<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Recommended effort<\/strong>: Low to Medium<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Prompt<\/strong>:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;Edit this [writing type] for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Clarity and concision<\/li>\n\n\n\n<li>Audience: [target reader]<\/li>\n\n\n\n<li>Tone: [formal\/conversational\/technical]<\/li>\n\n\n\n<li>Length: [target word count or range]<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Keep the core message intact. Remove jargon where possible. Suggest one sentence that captures the main idea. Don&#8217;t add new information; only reshape existing text.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Why it works<\/strong>: Clear editing criteria prevent unnecessary rewrites. Specifying audience and tone ensures consistency. Asking for the core sentence forces prioritization.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Prompt 6: Structured data extraction prompt<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Best for<\/strong>: Extracting information from text into JSON, creating datasets<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Recommended effort<\/strong>: Medium to High<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Prompt<\/strong>:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;Extract information from this text and return valid JSON matching this schema:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">{<br>&#8220;title&#8221;: &#8220;string&#8221;,<br>&#8220;items&#8221;: [<br>{&#8220;name&#8221;: &#8220;string&#8221;, &#8220;value&#8221;: &#8220;string&#8221;, &#8220;category&#8221;: &#8220;string&#8221;}<br>],<br>&#8220;summary&#8221;: &#8220;string&#8221;<br>}<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Rules:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use only data explicitly stated in the text<\/li>\n\n\n\n<li>If a field is missing, omit it from the JSON<\/li>\n\n\n\n<li>Return ONLY valid JSON, no other text<\/li>\n\n\n\n<li>Don&#8217;t invent data<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Why it works<\/strong>: Providing a schema eliminates guessing. Rules about missing fields and fabrication prevent errors. Requesting only JSON forces compliance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How to Use Claude Sonnet 5.5 for Coding<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Coding workflows benefit from a structured approach: inspect, plan, implement, test, fix, and verify.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Give Claude repository context<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Before asking for changes, help Claude understand your codebase:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;Here&#8217;s the repository structure. Here are the key files. Here are our coding conventions. The test framework is [X]. Dependencies are installed via [Y].&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This context prevents Claude from making changes that break conventions or ignore your build system.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Define the requested change precisely<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Vague: &#8220;Improve the login function.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Clear: &#8220;Add rate limiting to the login endpoint. Reject more than 5 failed attempts per IP in 15 minutes. Return a 429 status with a retry-after header. Log attempts to [log destination]. Use the existing [rate-limit library] if available.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Precision prevents misunderstandings and scope creep.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Let Claude inspect before editing<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ask Claude to review the code first: &#8220;Inspect the current login.js file and explain the current implementation.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This turns up potential issues, dependencies, and assumptions before Claude starts changing code.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Require tests, builds, or type checks<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;When the change is complete, run npm test. If any tests fail, fix the failures and rerun. Report the test output. Don&#8217;t move on until tests pass.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Real verification catches bugs that static review misses.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Control unnecessary refactoring<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Many developers appreciate when Claude also cleans up nearby code. If you don&#8217;t:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;Make only the requested changes. Do not refactor nearby code unless it&#8217;s necessary to complete the request. If you see opportunities for improvement, mention them at the end instead of implementing them.&#8221;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Increase effort for difficult debugging<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For bugs that are hard to locate, use at least high effort:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;This feature works in staging but fails in production. Here&#8217;s the error. Here&#8217;s the code. Debug this step by step. Use high effort to think through possible causes. Test your fix before reporting it as complete.&#8221;<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Claude Sonnet 5.5 Workflows for Research and Knowledge Work<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A good research workflow moves through stages: question, search, gather, analyze, cross-check, synthesize, cite.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. Ask the question clearly<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;Compare cloud storage providers for a small team&#8217;s use case. We need: file sync across 3 devices, version history, sharing controls, and HIPAA compliance. Budget is under $50\/month. Prioritize security and ease of use over features.&#8221;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. Search for current information<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Don&#8217;t assume training knowledge is current. Use search for pricing, features, policy changes, and recent reviews.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3. Gather sources<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Ask Claude to collect current information: &#8220;Search for and summarize the latest pricing and features for each provider. Include links to official pages.&#8221;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4. Analyze findings<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;Based on the sources you found, which provider best fits our criteria? Explain your reasoning.&#8221;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>5. Cross-check important facts<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Don&#8217;t accept answers without verification: &#8220;Verify the HIPAA compliance claim by checking each provider&#8217;s official security documentation.&#8221;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>6. Synthesize and recommend<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;Write a brief recommendation with pros and cons for the top two options.&#8221;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>7. Cite sources<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Always include links or references: &#8220;All facts come from [source]. Pricing verified on [date].&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This workflow ensures your research is current, accurate, and traceable.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How to Use Claude Sonnet 5.5 With Long Documents and Visual Inputs<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sonnet 5.5&#8217;s 1M-token context window means you can paste entire documents, multiple articles, or detailed transcripts into a single conversation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Document handling<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A large context window does not eliminate the need for clear instructions. Pasting a 100-page document without guidance often results in Claude asking clarifying questions or producing generic summaries.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Instead:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;Analyze this document [paste document]. Extract: [specific points]. Ignore: [irrelevant sections]. Format as: [structure]. Focus on: [your main interest].&#8221;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Cross-document comparison<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">You can paste multiple documents and ask Claude to compare them:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;I&#8217;ve pasted three budget proposals below. Compare them on: cost, timeline, risk, and resource requirements. Which is strongest? Why?&#8221;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Screenshots and charts<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Paste screenshots, diagrams, and charts directly into Claude.ai or include them as base64 in API calls. Sonnet 5.5 can read these and explain what they show.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Complex visual inputs<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">For dense charts and technical drawings, Claude&#8217;s accuracy improves dramatically if you give it a tool to crop, zoom, or run code on the image. At high effort levels, these tools become even more valuable. In testing, adding tools to charts improved Claude&#8217;s accuracy more than raising effort from high to max.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Claude Sonnet 5.5 Structured Outputs and JSON<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When you need reliable JSON output, use structured outputs where available. With structured outputs, Claude&#8217;s response text is guaranteed to match your schema, eliminating parsing errors.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>When to use structured outputs<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>You need guaranteed JSON compliance<\/li>\n\n\n\n<li>You&#8217;re building an automated workflow that depends on parsing<\/li>\n\n\n\n<li>You&#8217;re extracting data into a database or API call<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Request structure<\/strong>:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Provide a schema in JSON Schema format and ask Claude to return structured output matching it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Why reasoning tasks with JSON are tricky<\/strong>:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On tasks that require a few steps of reasoning before producing JSON output, Claude sometimes skips thinking and produces less accurate results, especially at low and medium effort.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Solutions:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Add to your system prompt: &#8220;Think the problem through before you answer.&#8221;<\/li>\n\n\n\n<li>Use high effort, which dedicates more resources to reasoning before output<\/li>\n\n\n\n<li>Use structured outputs, which moves reasoning into thinking blocks while output stays in text<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>About max_tokens<\/strong>:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When using structured outputs with reasoning, thinking and output share the same token limit. Set max_tokens higher than you would for a simple request. For agentic work, use max_tokens: 128000.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Treat any response with stop_reason: &#8220;max_tokens&#8221; as a failed attempt and retry. The response may have valid JSON, but incomplete thinking usually means incomplete reasoning.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Best Claude Sonnet 5.5 Workflow by Use Case<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Use case<\/strong><\/td><td><strong>Starting effort<\/strong><\/td><td><strong>Prompt focus<\/strong><\/td><td><strong>Verification<\/strong><\/td><\/tr><tr><td>Writing\/editing<\/td><td>Low to Medium<\/td><td>Tone, audience, clarity<\/td><td>Editorial review<\/td><\/tr><tr><td>Research\/comparisons<\/td><td>Medium to High<\/td><td>Sources, freshness, specificity<\/td><td>Fact-check key claims<\/td><\/tr><tr><td>Coding features<\/td><td>Medium to High<\/td><td>Scope, conventions, tests<\/td><td>Run tests or build<\/td><\/tr><tr><td>Debugging<\/td><td>High<\/td><td>Error context, reproduction, root cause<\/td><td>Test the fix<\/td><\/tr><tr><td>Data analysis<\/td><td>Medium to High<\/td><td>Calculations, schema, accuracy<\/td><td>Spot-check results<\/td><\/tr><tr><td>Long document analysis<\/td><td>Medium to High<\/td><td>Extraction, focus areas<\/td><td>Cross-reference sources<\/td><\/tr><tr><td>Visual charts\/diagrams<\/td><td>High + tools<\/td><td>Crop, zoom, specificity<\/td><td>Inspect source data<\/td><\/tr><tr><td>Agentic workflows<\/td><td>Medium to High<\/td><td>Scope, stop conditions, verification<\/td><td>Monitor execution<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">These are practical starting points based on the documented behavior of Sonnet 5.5. Your own workload may differ. Test and adjust based on your results.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Common Claude Sonnet 5.5 Mistakes<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. Automatically using the highest effort<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Mistake:<\/strong> Assuming max effort always produces better results.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Fix:<\/strong> Start with medium or high and test your workload. Use xhigh or max only when testing shows a meaningful quality improvement.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. Treating effort levels as identical to Sonnet 5<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Mistake:<\/strong> Assuming the effort level that worked well on Sonnet 5 will behave the same way on Sonnet 5.5.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Fix:<\/strong> Recalibrate against your own benchmarks. Sonnet 5.5&#8217;s effort levels have been adjusted, so the same setting may produce different quality, latency, or cost.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3. Using <\/strong><strong>between_tools<\/strong><strong> for reasoning tasks without tools<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Mistake:<\/strong> Using between_tools for tasks that require substantial reasoning but don&#8217;t involve tool calls.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Fix:<\/strong> Use adaptive thinking instead. between_tools is intended for workflows where you specifically want to skip up-front thinking and let the model reason between tool calls.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4. Asking Claude to reveal its reasoning<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Mistake:<\/strong> Asking Claude to provide its hidden thinking process.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Fix:<\/strong> Ask for a concise explanation, key assumptions, decision criteria, or a step-by-step summary in the final response instead.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>5. Relying on training knowledge for current information<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Mistake:<\/strong> Treating Claude&#8217;s answer as current when asking about prices, policies, availability, or recent events.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Fix:<\/strong> Use search or other current-information tools and ask Claude to verify time-sensitive claims against reliable sources.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Claude Sonnet 5.5 Limitations and Considerations<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Claude Sonnet 5.5 is powerful but not unlimited.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Cost scales with usage<\/strong>: Higher effort settings and larger context windows increase token usage and cost. Monitor usage for agentic tasks that run for multiple turns.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Latency increases with effort<\/strong>: Low effort is fastest. High and xhigh efforts require more computation and longer response times.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Higher effort doesn&#8217;t guarantee better output<\/strong>: On many tasks, high effort produces the same quality as xhigh at a fraction of the cost and latency. Test to find the right level for your workload.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Knowledge has a cutoff<\/strong>: Training knowledge ends in June 2026. For current information, use search or other tools.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Factual information should be verified<\/strong>: Claude can and does make mistakes. For research, business decisions, and important facts, verify key claims independently.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Coding requires testing<\/strong>: Claude&#8217;s code suggestions can have bugs. Run tests, build, or type-check before deploying.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Tool use depends on integration<\/strong>: Search, code execution, and other tools only work if your product or API integration includes them.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Safety refusals are enforced<\/strong>: Claude may decline certain requests. If you need an exception, check Anthropic&#8217;s verification programs, such as the Life Sciences Verification Program.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>API behavior differs from chat<\/strong>: The Claude Platform API gives you direct control over effort, temperature, rejection, and other parameters. Claude.ai and Claude Code abstract some of these settings for ease of use.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Sonnet 5.5 isn&#8217;t the right choice for every extremely complex, open-ended task<\/strong>: For very difficult research or reasoning problems with no clear end state, Claude Opus 5.5 may be more appropriate.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Claude Sonnet 5.5 Quick Reference<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Best starting effort for your workload?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Simple questions: Low<\/li>\n\n\n\n<li>Knowledge work: Medium<\/li>\n\n\n\n<li>Agentic coding: Start at Medium, move to High<\/li>\n\n\n\n<li>Hard reasoning or research: High<\/li>\n\n\n\n<li>Extremely difficult problems: Test High first, then Xhigh if needed<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>For agentic coding<\/strong>: Start around Medium for well-specified tasks. Move to High for harder or longer work. Don&#8217;t default to Max without testing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>For latency-sensitive chat<\/strong>: Use Low or Medium. Higher effort increases the wait before the first token.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>For difficult reasoning<\/strong>: Test High, then Xhigh, then Max only if you see quality gains.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>For no up-front thinking<\/strong>: Use between_tools at High effort or below. Use adaptive thinking for reasoning tasks without tools.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>For current information<\/strong>: Use search tools. Tell Claude to verify changed facts rather than assuming training knowledge.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>For coding<\/strong>: Verify with a real test, build, or type-check. Don&#8217;t accept summaries.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>For charts and technical drawings<\/strong>: Provide or use tools that crop, zoom, or run code on the image.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>For JSON output<\/strong>: Prefer structured outputs where available. For reasoning tasks with JSON, use high effort or add &#8220;Think the problem through before you answer.&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>For large documents<\/strong>: Give specific extraction instructions. Specify what to focus on and what to ignore.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Don&#8217;t set <\/strong><strong>temperature<\/strong><strong>, <\/strong><strong>top_p<\/strong><strong>, or <\/strong><strong>top_k<\/strong>: Sonnet 5.5 doesn&#8217;t accept non-default values. This will return a 400 error.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Final Takeaway<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sonnet 5.5 is built for speed and everyday work, but using it well requires understanding how to dial in the right effort level, craft focused prompts, and verify outcomes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Start with the task, not the maximum setting. Effort is a quality\/latency\/cost control you adjust based on testing. Adaptive thinking handles reasoning by default. Use between_tools selectively when you specifically need to turn off up-front thinking.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Define scope explicitly so Claude knows when to stop. Give Claude access to tools for current information and complex visual inputs. Require real verification for code, especially tests and builds.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The most effective Sonnet 5.5 users build repeatable workflows rather than relying on one-shot prompts. They test effort levels against their own benchmarks, not generic recommendations. They treat Claude as capable but not infallible, and they verify important outputs before acting on them.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Start with these patterns, measure your results, and adjust. The configurations and prompts that work best for your workflow will become clear quickly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Frequently Asked Questions<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>How do I use Claude Sonnet 5.5?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Access it via Claude.ai, Claude Code, Claude Platform, or the Claude API using the model ID claude-sonnet-5-5. Choose an effort level based on your task, write a clear prompt, and verify important outputs before acting on them.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>What are the best settings for Claude Sonnet 5.5?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">There&#8217;s no universal best. Start with medium effort for most work. Use high for complex tasks. Use low for latency-sensitive chat. Use xhigh or max only after testing shows a quality gain. Adaptive thinking is on by default and works well for most tasks.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>What effort level should I use with Claude Sonnet 5.5?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">It depends on your task. For simple questions, use low. For knowledge work and well-defined coding, start with medium. For complex reasoning, debugging, and research, use high. Reserve xhigh and max for work where you&#8217;ve measured a quality improvement.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Does Claude Sonnet 5.5 have adaptive thinking?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. Adaptive thinking is enabled by default. The model automatically allocates thinking time based on task complexity. You control the overall thinking budget with the effort parameter.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>What is <\/strong><strong>between_tools<\/strong><strong> in Claude Sonnet 5.5?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">between_tools is a thinking mode that disables up-front thinking and only allows thinking between tool calls. It&#8217;s useful for agentic workflows where latency matters. Use it only at high effort or below. For reasoning tasks without tools, use adaptive thinking instead.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Is Claude Sonnet 5.5 good for coding?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. It handles feature implementation, bug fixes, refactoring, and code reviews well. For best results, provide repository context, define the change clearly, and require actual test execution before accepting work as done.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>How do I write prompts for Claude Sonnet 5.5?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Structure prompts to include task, context, constraints, desired output, scope, and verification method. Use explicit language. Tell Claude what not to do, what to stop at, and how to verify the work. Clear prompts prevent misunderstandings.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>How much context can Claude Sonnet 5.5 handle?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Up to 1 million tokens. That&#8217;s roughly 750,000 words or entire documents plus conversations. Use clear instructions to guide Claude&#8217;s focus within that context.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>What is the Claude Sonnet 5.5 API model ID?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">claude-sonnet-5-5 on the Claude Platform API, Amazon Bedrock, Google Cloud, Microsoft Foundry, and AWS. Other platforms may use different IDs. Check your platform&#8217;s documentation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>How can I make Claude Sonnet 5.5 verify code?<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Add to your system prompt: &#8220;When you change code, run a real check that exercises the change: tests, type-checker, or build. If dependencies aren&#8217;t installed, install them. Only report the change as done when the check passes.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Claude Sonnet 5.5 is powerful, but choosing the model is only the first step. Getting the most from it requires understanding effort levels, crafting [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":2611,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6],"tags":[954,487,320,322,185,258,156,577,94,497,222,1029,1028,136],"content_cluster":[7],"content_type":[21],"search_intent":[25],"tool_category":[31,28],"class_list":["post-2608","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-how-to","tag-adaptive-thinking","tag-agentic-coding","tag-ai-coding","tag-ai-research","tag-ai-tools","tag-ai-workflows","tag-anthropic","tag-claude","tag-claude-ai","tag-claude-api","tag-claude-code","tag-claude-prompts","tag-claude-sonnet-5-5","tag-prompt-engineering","content_cluster-how-to","content_type-how-to-guide","search_intent-commercial","tool_category-ai-coding","tool_category-ai-writing"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.five.reviews\/?rest_route=\/wp\/v2\/posts\/2608","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.five.reviews\/?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.five.reviews\/?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.five.reviews\/?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.five.reviews\/?rest_route=%2Fwp%2Fv2%2Fcomments&post=2608"}],"version-history":[{"count":1,"href":"https:\/\/www.five.reviews\/?rest_route=\/wp\/v2\/posts\/2608\/revisions"}],"predecessor-version":[{"id":2612,"href":"https:\/\/www.five.reviews\/?rest_route=\/wp\/v2\/posts\/2608\/revisions\/2612"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.five.reviews\/?rest_route=\/wp\/v2\/media\/2611"}],"wp:attachment":[{"href":"https:\/\/www.five.reviews\/?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2608"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.five.reviews\/?rest_route=%2Fwp%2Fv2%2Fcategories&post=2608"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.five.reviews\/?rest_route=%2Fwp%2Fv2%2Ftags&post=2608"},{"taxonomy":"content_cluster","embeddable":true,"href":"https:\/\/www.five.reviews\/?rest_route=%2Fwp%2Fv2%2Fcontent_cluster&post=2608"},{"taxonomy":"content_type","embeddable":true,"href":"https:\/\/www.five.reviews\/?rest_route=%2Fwp%2Fv2%2Fcontent_type&post=2608"},{"taxonomy":"search_intent","embeddable":true,"href":"https:\/\/www.five.reviews\/?rest_route=%2Fwp%2Fv2%2Fsearch_intent&post=2608"},{"taxonomy":"tool_category","embeddable":true,"href":"https:\/\/www.five.reviews\/?rest_route=%2Fwp%2Fv2%2Ftool_category&post=2608"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}