OpenAI makes GPT-5.6 Luna the default for free ChatGPT users
Free and Go users will get unlimited everyday chats and a Think button, while Plus and Pro users get an updated Sol model with adjustable reasoning.
By Ryan Merket · Published · Updated
Primary source: Axios
Why it matters
OpenAI is using Luna's lower inference cost to remove a major free-tier restriction. Paid ChatGPT is increasingly differentiated by model quality, reasoning control and tools rather than basic chat access.
OpenAI will make GPT-5.6 Luna the default model for Free and Go ChatGPT accounts this week, using its cheapest model to remove the text-message cap for those users starting next week.…
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