OpenAI upgrades ChatGPT with GPT-5.6 Sol and expands free access
Improving GPT-5.6 Sol in ChatGPT—and expanding access for free users
OpenAI is rolling out updates to ChatGPT, introducing GPT-5.6 Sol for Plus and Pro users with improved factual accuracy and a new slider to control reasoning depth. Free users get GPT-5.6 Luna as the default model with unlimited text chats and a Think button for harder questions. The updates aim to make answers more focused and reliable, with internal evaluations showing a significant reduction in factual errors.
Access shapes opportunity, and this update gives more people the ability to keep asking, develop an idea, and get help when they need it.