OpenAI's changelog says GPT-5.5 will retire from ChatGPT, ChatGPT Work, and Codex on October 14, 2026, on all plans including consumer, Business, Enterprise, and Edu. The retirement does not apply to the OpenAI API.
In the News: October 1, 2026 (Extra 2)
OpenAI retires GPT-5.5 from Codex with ChatGPT sign-in on October 14; saved model settings, custom agents and scheduled tasks that select it need updating.
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