{"id":2626,"date":"2026-09-30T04:06:26","date_gmt":"2026-09-30T11:06:26","guid":{"rendered":"https:\/\/www.five.reviews\/?p=2626"},"modified":"2026-09-30T04:06:28","modified_gmt":"2026-09-30T11:06:28","slug":"how-to-use-gpt-6-1-sol","status":"publish","type":"post","link":"https:\/\/www.five.reviews\/how-to\/how-to-use-gpt-6-1-sol\/","title":{"rendered":"How to Use GPT-6.1 Sol in ChatGPT Work and Codex"},"content":{"rendered":"\n

GPT-6.1 Sol<\/a> is available starting today to all Plus, Pro, Business, Enterprise, and Edu users in ChatGPT Work and Codex, where it delivers practical intelligence for complex coding, computer use, and professional work. The model nearly matches GPT-6 Astra’s<\/a> intelligence on agentic coding, computer use, and professional work at one-fifth of Astra’s standard API input and output token prices. This guide walks you through exactly how to access and use it effectively in both environments, from selecting the model to structuring your first task.<\/p>\n\n\n\n

GPT-6.1 Sol at a Glance<\/strong><\/h2>\n\n\n\n

GPT-6.1 Sol is the updated Sol-class model in OpenAI’s GPT-6 family that OpenAI describes as a model for complex coding, computer use, and professional work when you want near-Astra capability at a lower cost. <\/a><\/p>\n\n\n\n

Question<\/strong><\/td>Answer<\/strong><\/td><\/tr>
What is GPT-6.1 Sol?<\/td>Mid-tier reasoning model for complex coding, debugging, computer use, and professional work<\/td><\/tr>
Where is it available?<\/td>ChatGPT Work, Codex, and OpenAI API<\/td><\/tr>
Is it available in regular ChatGPT Chat?<\/td>No, it is not yet available in Chat<\/td><\/tr>
What is it designed for?<\/td>Agentic coding<\/a> workflows, computer use tasks, multi-step professional work<\/td><\/tr>
Can developers use it in Codex?<\/td>Yes, GPT-6.1 Sol is available in Work and Codex on eligible plans<\/td><\/tr>
Does it have reasoning levels?<\/td>Yes, reasoning. effort supports low, medium (default), high, xhigh, and max<\/td><\/tr>
What pricing applies?<\/td>$2.00 per million input tokens and $10.00 per million output tokens, with cached input at $0.10 per million (50% discount)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

What Is GPT-6.1 Sol?<\/strong><\/h2>\n\n\n\n

GPT-6.1 Sol is OpenAI’s mid-tier reasoning model in the GPT-6 series, released on September 29, 2026, as an upgrade to GPT-6 Sol. OpenAI says GPT-6.1 Sol delivers significant improvements over its predecessor GPT-6 Sol across complex tasks, including programming and debugging, understanding documents, and executing multistep workflows. <\/a><\/p>\n\n\n\n

The model fills a practical gap: it performs near-identically to GPT-6 Astra<\/a> on many coding and professional tasks but at substantially lower cost. The model improves factual accuracy when given difficult prompts, and GPT-6.1 Sol cuts factual errors and better follows safety limits compared to earlier Sol versions. <\/a><\/p>\n\n\n\n

Reasoning is always on with GPT-6.1 Sol; it does not support no or minimal reasoning effort. This means every interaction includes reasoning tokens, which affects pricing and latency. <\/a><\/p>\n\n\n\n

Where Can You Use GPT-6.1 Sol?<\/strong><\/h2>\n\n\n\n

GPT-6.1 Sol in ChatGPT Work<\/strong><\/h3>\n\n\n\n

GPT-6.1 Sol is available to all Plus, Pro, Business, Enterprise, and Edu users in ChatGPT Work. Work is OpenAI’s environment for longer, multi-step professional tasks where you want finished deliverables, analysis across documents, or structured outputs. <\/a><\/p>\n\n\n\n

Common Work use cases include analyzing policy documents, synthesizing research across multiple PDFs, structuring business recommendations, generating technical specifications, and conducting computer use tasks that span multiple steps across applications.<\/p>\n\n\n\n

GPT-6.1 Sol in Codex<\/strong><\/h3>\n\n\n\n

GPT-6.1 Sol is available in Codex for software development and engineering workflows. Codex is available as the ChatGPT desktop app, the CLI, and an IDE extension. In an interactive CLI session, use \/model to switch models or adjust reasoning effort.\u00a0<\/a><\/p>\n\n\n\n

Codex specializes in repository-aware development: inspecting codebases, implementing features across multiple files, refactoring, debugging production issues, and running tests.<\/p>\n\n\n\n

GPT-6.1 Sol via the OpenAI API<\/strong><\/h3>\n\n\n\n

Developers can access GPT-6.1 Sol through the OpenAI API using the model ID gpt-6.1-sol. This is separate billing and access from ChatGPT Work and Codex.<\/p>\n\n\n\n

How to Use GPT-6.1 Sol in ChatGPT Work<\/strong><\/h2>\n\n\n\n
\"How<\/figure>\n\n\n\n

Step 1: Open ChatGPT Work<\/strong><\/h3>\n\n\n\n

Launch the ChatGPT desktop app or navigate to chatgpt.com and select Work from the left sidebar. Access depends on having an eligible plan: Plus, Pro, Business, Enterprise, or Edu. <\/a><\/p>\n\n\n\n

Step 2: Open the Model Picker<\/strong><\/h3>\n\n\n\n

In the ChatGPT desktop app and ChatGPT on the web, look for the model and reasoning control beneath the composer. By default, you see preset power levels: Balanced, Smarter, or Faster, depending on your account. <\/a><\/p>\n\n\n\n

Step 3: Select GPT-6.1 Sol<\/strong><\/h3>\n\n\n\n

Open Advanced to choose a specific model, reasoning effort, or speed. Select GPT-6.1 Sol from the model dropdown. If GPT-6.1 Sol doesn’t appear, your plan or workspace may not have access yet (see the troubleshooting section below). <\/a><\/p>\n\n\n\n

Step 4: Choose the Reasoning Level<\/strong><\/h3>\n\n\n\n

Reasoning effort supports low, medium (default), high, xhigh, and max. Here’s how to decide:\u00a0<\/a><\/p>\n\n\n\n