Modelpeers

GPT-4.1 changelog

Every change to GPT-4.1 that Modelpeers has recorded, newest first, each with the source it came from. The record starts Oct 14, 2026.

All (1)Retiring (1)

October 2026

GPT-4o, GPT-4o mini, GPT-4.1

4 models from OpenAI

Retiring

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.

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