GPT-5.6 Luna becomes the default model for Free and Go users, and Plus and Pro users get GPT-5.6 Sol.
OpenAI announced today that it will remove limits on text-based chats for all ChatGPT users. The company also introduced GPT-5.6 Luna as the default model for Free and Go users, replacing GPT-5.5. The new model will power the chat experience and will be available to users this week.
ChatGPT has crossed 1 billion weekly users, and OpenAI is now unifying the Free and Go tiers under the Luna model. Plus and Pro subscribers will receive an upgraded GPT-5.6 Sol model for quick tasks. The company says Sol delivers more compact and robust answers, and it remains a separate version from the one used in Codex and Work.
For builders, the removal of text limits lowers the cost of large-scale chat automations and evals. The Think button and thinking slider give users fine-grained control over reasoning depth, which helps with complex queries. Enterprise teams should also expect fewer factual errors, as OpenAI reports 62% and 68% reductions for Luna and Sol.
OpenAI will roll out the new Think button and unlimited text chats to all users next week. Plus and Pro users get the upgraded GPT-5.6 Sol today. Watch for separate file, image, voice, and image-generation limits to remain in place as the chat experience opens up.
What matters
- OpenAI announced it will remove text chat limits and make GPT-5.6 Luna the default for Free and Go users.
- Unlimited text chats remove a cost barrier for chat-based products, and new models cut factual errors.
- Unlimited text chats and the new Think button are rolling out to all users next week.
Why it matters
Unlimited text chats and the new Think button are rolling out to all users next week.
This GenAI News article was prepared in original wording using reporting and materials published by TechCrunch AI. Source reference: https://techcrunch.com/2026/08/06/openai-brings-unlimited-chatgpt-text-chats-to-free-users/.
Drafted by the GenAI News review pipeline.