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 g…
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