GPT-5.1-Codex

Model at OpenAI

124th of 150 on Arena WebDev

GPT-5.1-Codex does not have a researched profile yet. Everything here comes from its recorded changes and public listings, each linked to its source.

The basics

As of Nov 1

Status: Retired Jul 23, 2026

Updates

Jul 23

Retired

Older Codex, chat-latest, search and deep research models shut down

Access to the April-announced batch, including gpt-5-codex, gpt-5.1-codex variants, gpt-5.2-codex, gpt-5-chat-latest, o3-deep-research and computer-use-preview, was shut down on July 23, 2026.

Action needed:: Switch to gpt-5.6-sol or gpt-5.6-terra.

Apr 22

Retiring

Older Codex, chat-latest, search and deep research models scheduled for July 23 shutdown

OpenAI announced shutdown on July 23, 2026 of computer-use-preview, the GPT-4o search previews, gpt-5-chat-latest, gpt-5.1-chat-latest, gpt-5-codex, gpt-5.1-codex variants, gpt-5.2-codex, o3-deep-research, o4-mini-deep-research and some mini audio and realtime snapshots.