OpenAI is removing limits on text-based chats for all users on ChatGPT, which recently crossed the 1 billion weekly user mark, the company announced today.
The new GPT-5.6 Luna model will power this experience and will be the default model for Free and Go users, replacing GPT-5.5.
Both users will also get a new “Think” button that lets them select higher reasoning power for complex questions. OpenAI said that there will still be separate limits for files, images, voice, and image generation.
The update brings changes for Plus and Pro users as well. They’ll gain access to an
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