OpenAI Updates ChatGPT: GPT-5.6 Sol & Luna Rollout

OpenAI is updating ChatGPT, introducing improvements for both paying and free users. For Plus and Pro subscribers, GPT-5.6 Sol is now more reliable with facts and provides more focused answers. A new slider allows these users to adjust how much thought ChatGPT puts into each response. Here's the thing: Free users are also getting an upgrade. Their default model is now GPT-5.6 Luna, with unlimited text chats. They can also access higher reasoning for harder questions using a new "Think" button. What's interesting is that internal evaluations show GPT-5.6 Sol and Luna significantly reduce factual errors compared to the previous GPT-5.5 Instant. The updates aim for more direct responses and a consistent experience across different conversation types. This matters because it means more accurate and accessible AI for a wider range of users.