OpenAI Rolls Out GPT-5.6 Sol and Luna Updates with Expanded Free Access
모델 출시 | Fri Aug 07 2026 00:00:00 GMT+0000 (Coordinated Universal Time) | 3 sources
OpenAI delivered improved GPT-5.6 Sol to ChatGPT paid users and provided unlimited text chat with GPT-5.6 Luna to free users.
Analysis
[OpenAI] released GPT-5.6 Sol update for Plus and Pro users [1][2]
- Improved factual accuracy and answer focus
- Reduced errors related to dates
- numbers
- sources
- and rules
- Applied more direct responses and cleaner formatting
[OpenAI] made GPT-5.6 Luna the default model for Free and Go users with unlimited text chat [1][2][3]
- New default model replacing GPT-5.5
- Removed rate limits on text chat
- Separate limits maintained for files
- images
- and voice
[ChatGPT] introduced a new Think button and Thinking slider [1][2]
- Think button for Free and Go users to access higher reasoning capability
- Slider for Plus and Pro users to adjust depth of thinking
- Available on web
- mobile
- and desktop
[OpenAI Internal Evaluations] reported major reductions in factual error rates for the GPT-5.6 series [1][3]
- Evaluations on finance
- health
- and legal prompts
- GPT-5.6 Luna reduced errors by 62% vs. GPT-5.5 Instant
- GPT-5.6 Sol reduced errors by 68%
[ChatGPT] unified Instant and Thinking experiences for a consistent user environment [1]
- The same model powers both Instant and deeper reasoning
- Ensures consistency in tone and style
- Naturally transitions based on effort level