OpenAI has updated ChatGPT so Free and Go users can use GPT-5.6 Luna for everyday text conversations without a fixed text-message cap, subject to safeguards. The change makes the default experience more capable, but it does not mean every tool inside ChatGPT is unlimited.
What you need to know
- GPT-5.6 Luna is the default everyday model for eligible Free and Go users.
- The Think control can request more reasoning for a difficult prompt.
- Image generation, uploads, data analysis and other tools can still have separate limits.
- Eligible paid plans can access GPT-5.6 Sol and adjust reasoning effort.
Practical next steps
Use Luna for routine research and drafting, and use Think when the task genuinely needs deeper reasoning. Verify medical, legal, financial and other consequential information with reliable primary sources.
Official sources
Last verified: 30 August 2026. Details can change; check the official sources before making an important decision.