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Over the past year, ChatGPT has evolved into something much more than just a tool for conversing. With that in mind, OpenAI is lifting all restrictions on text-based conversations. In addition, ChatGPT will become even more effective thanks to the integration of an improved version of GPT-5.6 Sol.
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The GPT-5.6 Sol model is becoming more intelligent within ChatGPT. OpenAI first demonstrated GPT-5.6 Sol in June as the flagship model in a family of three developments. The following month, Sol, Terra, and Luna became widely available within ChatGPT and Codex.
Now, OpenAI is releasing a variant of GPT-5.6 Sol that has been specially tuned for everyday conversations in ChatGPT. According to the developer’s representatives, the update is designed to generate more accurate responses, flexibly adjust the level of detail for each individual question, and eliminate unnecessary formatting elements.
The GPT-5.6 Sol modifications in ChatGPT are designed to provide users with more direct answers, concise formatting, and the removal of unnecessary details in situations where they are not helpful.
When presented with a short question, the algorithm provides a clear answer that takes the necessary context into account. For more complex tasks, such as multi-step planning, conducting research, or writing content, a detailed response is generated with the main recommendation clearly highlighted.
This update also combines the Instant and Thinking modes within ChatGPT for Plus and Pro subscribers. Both modes will be powered by GPT-5.6 Sol, and a new dedicated slider will allow users to adjust the depth of analysis the algorithm uses to generate a response.
This slider will be available in all ChatGPT apps for the web, mobile devices, and PCs. Users will be able to keep it set to a low level for simple, everyday questions or increase the level of reasoning for analytics, planning, content creation, coding, or making complex decisions.
Starting today, Plus and Pro subscribers can try out the new slider in ChatGPT on computers, smartphones, and the web interface to choose how deeply ChatGPT should delve into its reasoning before providing a response. You can leave it in fast mode for basic queries or slide the slider up for planning, information research, coding, copywriting, or tasks that require a more thoughtful approach.
The new GPT-5.6 Sol powers all chats for paid users, including Instant, creating a consistent experience.
In our high-stakes factuality evaluation covering finance, medicine, and law, the new GPT-5.6 Sol produced 68% fewer responses with factual errors than GPT-5.5 Instant. pic.twitter.com/8iKN49tsxc
– OpenAI (@OpenAI) August 6, 2026
In addition, OpenAI claims that the modified version performs much more reliably when processing queries related to dates, 100% calculation accuracy, rules, primary sources, and assumptions. According to internal tests covering financial, medical, and legal queries, responses containing at least one factual error occurred 68% less frequently in GPT-5.6 Sol compared to GPT-5.5 Instant.
Unlimited access to text chats in ChatGPT for the free plan. Another significant change concerns the audience that interacts with ChatGPT without paid subscriptions. OpenAI is expanding access to its latest models for free users, providing unlimited text chats powered by GPT-5.6 Luna, as well as adding a new “Think” button to tackle complex tasks.
For questions that require in-depth analysis, free account holders can click the new “Think” button, giving GPT-5.6 Luna more time to thoroughly analyze the response. Plus and Pro subscribers can start using the updated GPT-5.6 Sol and the reasoning depth slider today. This update applies only to the model used in standard ChatGPT conversations.
OpenAI notes that the GPT-5.6 Sol version, which powers ChatGPT Work and Codex, remains unchanged in this release.
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