Modelpeers

GPT-5.1-Codex-Max changelog

Every change to GPT-5.1-Codex-Max that Modelpeers has recorded, newest first, each with the source it came from. The record starts Apr 7, 2026.

All (1)Retiring (1)

April 2026

OpenAI Codex character

GPT-5.2-Codex, GPT-5.1-Codex-Max and OpenAI Codex

3 products from OpenAI

Retiring

Codex drops GPT-5.2-Codex, GPT-5.1-Codex models and GPT-5 for ChatGPT sign-in

From April 7 the Codex model picker stopped showing gpt-5.2-codex, gpt-5.1-codex-mini, gpt-5.1-codex-max, gpt-5.1-codex, gpt-5.1 and gpt-5, and they were removed for ChatGPT sign-in on April 14.

Who is affected:
Codex users signed in with ChatGPT who selected these models.
Action needed:
Switch to gpt-5.4 or another listed model, or use an API key.

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