#openai#api#gpt-4o

    GPT-4o API shutdown on January 14: what to do

    GPT-4o shuts down in OpenAI's API on January 14, 2027, with GPT-4.1 and their minis. Which models go and what to switch to.

    The GPT-4o API shutdown is set for January 14, 2027, and it also covers GPT-4o mini, GPT-4.1 and GPT-4.1 mini. OpenAI announced it on October 14, 2026 and recommends switching to gpt-6-luna. If your app, automation or chatbot calls any of those four models by name, you have about three months to check it.

    Which models leave the API?

    OpenAI's official deprecations notice lists four models, with their exact versions:

    • GPT-4o: gpt-4o-2024-08-06 and gpt-4o-2024-11-20.
    • GPT-4o mini: gpt-4o-mini-2024-07-18.
    • GPT-4.1: gpt-4.1-2025-04-14.
    • GPT-4.1 mini: gpt-4.1-mini-2025-04-14.

    The retirement date is the same for all of them: January 14, 2027. After that day, calls to those names stop working.

    A planning calendar with dates marked by hand, like the deadline to migrate off GPT-4o before the shutdown

    What happens to fine-tuned models?

    Fine-tuned models follow the same calendar as their base model. If you fine-tuned on GPT-4o or GPT-4.1, your custom model also stops being available on January 14, 2027. It is the easiest point to miss, because a fine-tuned model's name does not always say which base it came from.

    Which model should you switch to?

    OpenAI recommends gpt-6-luna as the replacement for all four models. The notice gives no price and no quality comparison, so it makes sense to test it on your own cases before migrating everything.

    A laptop with a code terminal open, searching for a model name before migrating off GPT-4o

    What this retirement does not say

    • It applies to the API, not to ChatGPT.
    • The notice lists only those four models; it does not mention other models in the GPT-4o family.

    How to apply it in your business?

    1. Search your code, your flows and your no-code tools for the name of each retired model.
    2. Write down which process depends on each one (customer support, summaries, classification).
    3. Test those processes with gpt-6-luna using real examples and compare the results.
    4. If you have fine-tuned models, plan when to retrain them on the new model.
    5. Set a switch date before January 14, 2027, not on the day itself.

    Other OpenAI changes are moving fast too; read the full breakdown of GPT-6.1 Sol and its 500K context in Codex.

    Frequently asked questions

    When does GPT-4o shut down in the API?

    On January 14, 2027. OpenAI published the notice on October 14, 2026.

    Is GPT-4.1 also shutting down?

    Yes. GPT-4.1 and GPT-4.1 mini are on the same list with the same date.

    Will my fine-tuned models keep working?

    Not after that date: fine-tuned models follow the calendar of their base model.

    Is GPT-4o being removed from ChatGPT?

    The notice is about the API. It says nothing about ChatGPT.

    Conclusion

    With the GPT-4o API shutdown landing on January 14, 2027, the practical move is to check today which model name your code uses, test the recommended replacement and migrate with time to spare.