OpenAI sets 2026-2027 API shutdown dates for GPT-4o, GPT-4.1, GPT-5, o3 and Whisper

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OpenAI has published a schedule of API deprecations running from late 2026 into 2027. GPT-4o, GPT-4o mini, GPT-4.1 and GPT-4.1 mini are set to leave the API on 14 January 2027, with gpt-6-luna recommended as the replacement. GPT-5, o3 and related models shut down on 11 December 2026, while Whisper and GPT-4o transcription models follow on 26 February 2027. The GPT-4 series received only about 92 days' notice, well short of the six months OpenAI generally promises, and one recommended replacement is itself retired just 37 days after it takes over.

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