OpenAI to roll out GPT-5.6 Luna as ChatGPT default
Technology
OpenAI will just roll out GPT-5.6 Luna as the new default for all ChatGPT plans, promising faster replies and 62% fewer factual mistakes than before.
The update is coming to both free and paid users later this week, making everyday chats smoother and more reliable.
OpenAI upgrades free and paid tiers
Free tier users will receive unlimited chats plus a handy "Think" button for tackling tougher questions.
If you're on Plus or Pro, you'll be upgraded to GPT-5.6 Sol, a smarter model that handles web research, planning, and decision-making with better accuracy and tone control.
There's even a reasoning slider so you can pick how deep the AI thinks for each task.