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Deprecated OpenAI API

GPT-4o and GPT-4.1 models removed from OpenAI API on 2027-01-14

OpenAI will remove several GPT-4 series models from the API on January 14, 2027: GPT-4o (gpt-4o-2024-08-06, gpt-4o-2024-11-20), GPT-4o mini (gpt-4o-mini-2024-07-18), GPT-4.1 (gpt-4.1-2025-04-14) and GPT-4.1 mini (gpt-4.1-mini-2025-04-14). The recommended replacement for all four is gpt-6-luna, and fine-tuned versions follow the same schedule as their base models. The API itself continues.

Published
Takes effect
2027-01-14
On October 14, 2026, we notified developers using certain GPT-4 series models of their deprecation and removal from the API on January 14, 2027.
— developers.openai.com, read the source

What this means for you

You're affected if you use OpenAI API on the hosted service, for commercial use or personal use, on the free tier or a paid plan.

Who is not affected

Users of models not listed in the deprecation table are not named as affected by this notice.

Ways out

  • Move to gpt-6-luna, the recommended replacementLow effort

    OpenAI names it as the replacement for all four listed models, so it is the most direct path.

  • Anthropic APIMedium effort

    An alternative hosted model API if you want to move away from OpenAI models entirely.

  • Cloudflare Workers AIMedium effort

    Hosts a range of models and could replace the OpenAI calls where your app runs on Cloudflare.

What the source doesn't say

  • The source does not say whether gpt-6-luna has the same pricing, limits or behaviour as the models it replaces.
  • The source does not give the names of the fine-tuned models affected, only that they follow their base models' schedule.
  • The source does not say whether the shutdown affects models accessed through other providers or platforms.

Summary, not legal advice; read the source.