OpenAI Announces Three-Month Notice for GPT-4 Series API Shutdown

OpenAI sent deprecation notices to developers using GPT-4 series models on October 14, 2026, announcing that these models will be removed from the API on January 14, 2027. The affected models include GPT-4o, GPT-4o mini, GPT-4.1, and GPT-4.1 mini, with gpt-6-luna recommended as the replacement.

According to OpenAI's API documentation, generally available models typically receive at least six months' advance notice before retirement. However, this specific shutdown provides only a three-month window between announcement and removal, potentially forcing dependent production applications to accelerate their migration testing and deployment plans.