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# OpenAI Is Shutting Down GPT-4o and GPT-4.1 in Its API on January 14, 2027
- URL: https://digirolla.com/openai-is-shutting-down-gpt-4o-and-gpt-4-1-in-its-api-on-january-14-2027/
- Published: 2026-10-16T18:53:51.000Z
- Updated: 2026-10-16T19:53:33.000Z
- Description: OpenAI has given developers three months' notice: GPT-4o, GPT-4o mini, GPT-4.1 and GPT-4.1 mini leave the API on January 14, 2027, fine-tuned versions included.
- Author: Digirolla
- Tags: OpenAI

OpenAI notified developers on October 14, 2026 that several GPT-4 series models will be removed from its API on January 14, 2027\. The recommended replacement for all of them is `gpt-6-luna`.

## Which models are affected

According to OpenAI's deprecations page, these snapshots shut down on January 14, 2027:

- 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`

OpenAI says fine-tuned versions of these models follow the same shutdown schedule as their base models.

## An earlier deadline for some snapshots

A separate, earlier entry on OpenAI's deprecations page sets an October 23, 2026 shutdown for the older `gpt-4o-2024-05-13` snapshot and for `gpt-4.1-nano`, with different recommended replacements. Developers should check exactly which model IDs their apps call.

## ChatGPT users are not affected

This notice is about the API. GPT-4o, GPT-4.1 and GPT-4.1 mini were already removed from ChatGPT earlier this year. The change affects apps, internal tools, chatbots and automations that send requests to OpenAI's API with these model names.

## Moving to gpt-6-luna

OpenAI recommends `gpt-6-luna` as the replacement for all four models. A few points to check before switching, based on OpenAI's documentation as summarized by migration guides:

- gpt-6-luna is a reasoning model with a default reasoning effort of medium. Setting `reasoning_effort` to `none` is the closest match to the older non-reasoning models.
- Function calling on the Chat Completions API requires `reasoning_effort: "none"`; otherwise, use the Responses API.
- Parameters such as `temperature` and `top_p` should be removed when reasoning effort is not `none`.
- gpt-6-luna cannot be fine-tuned, so teams relying on fine-tuned GPT-4o or GPT-4.1 models will need a different approach.

## Azure runs its own schedule

Microsoft's Azure OpenAI service has a separate retirement timeline. Its model retirement page lists April 14, 2027 for the same GPT-4o, GPT-4o mini, GPT-4.1 and GPT-4.1 mini versions.

## What to do now

Search your code, configuration files and gateways for both dated snapshot names and plain aliases like `gpt-4o` and `gpt-4.1`, then test your workloads on the replacement well before January 14, 2027.

## Sources

- [OpenAI API: Deprecations](https://developers.openai.com/api/docs/deprecations?ref=digirolla.com)
- [DataNorth: GPT-4o and GPT-4.1 leave OpenAI's API on 14 January 2027](https://datanorth.ai/news/gpt-4o-and-gpt-4-1-leave-openais-api-on-14-january-2027-fine-tuned-versions-included?ref=digirolla.com)
- [AIVAX: How to migrate to gpt-6-luna](https://aivax.net/blog/migrate-gpt-4o-and-gpt-4-1-to-gpt-6-luna/?ref=digirolla.com)