OpenAI makes GPT-5.6 Luna the default free ChatGPT model with unlimited chats
emmanuelvivier · x · 2026-08-15
OpenAI has launched GPT-5.6 Luna, making it the default model for ChatGPT free and Go tier users. The update introduces unlimited text messaging for free users and features a new "Think" button, designed to enhance the model's reasoning capabilities.
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