OpenAI to Retire GPT-4o and GPT-4.1 From API by January 14, 2027

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OpenAI has told developers that GPT-4o, GPT-4o mini, GPT-4.1, and GPT-4.1 mini will be removed from its API on January 14, 2027, with requests to those models failing afterward. The company is directing users to gpt-6-luna as the replacement for all four, and custom fine-tunes follow the same timeline. An earlier shutdown on October 23, 2026 affects the May 2024 GPT-4o snapshot and several other older models, so developers pinning that specific version face a sooner deadline. The notice gave roughly three months, which falls short of the six-month minimum OpenAI typically promises for generally available models. ChatGPT users are not affected, since GPT-4o was already removed from ChatGPT's model picker in February 2026.

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