GPT-4o changelog

GPT-4o, GPT-4o mini, GPT-4.1 and GPT-4.1 mini to shut down January 14, 2027

The remaining GPT-4o, GPT-4o mini, GPT-4.1 and GPT-4.1 mini snapshots, and fine-tunes built on them, will be removed on January 14, 2027, with gpt-6-luna as the replacement.

Takes effect Jan 14, 2027 · in 74 days

Who is affected:

Apps and fine-tunes built on GPT-4o or GPT-4.1.

Action needed:

Migrate to gpt-6-luna before January 14, 2027 and re-test quality.

GPT-4o removed from ChatGPT without notice at GPT-5 launch, then restored for paid users

At the GPT-5 launch OpenAI retired GPT-4o, GPT-4.1, GPT-4.5, o3 and other models in consumer ChatGPT with no deprecation period. After user backlash it brought GPT-4o back to the picker for paid users. The Hacker News discussion drew 428 points and 412 comments.

Who is affected:

ChatGPT consumers who relied on GPT-4o.

What to do:

No action needed (historical event).