Modelpeers
OpenAI Codex character

OpenAI Codex and GPT-5.5

2 products from OpenAI

Now available

GPT-5.5 available in Codex and recommended for most tasks

GPT-5.5 became available in Codex as the recommended choice for most Codex tasks once it appears in the model picker.

Who is affected:
Codex users.
What to do:
Select gpt-5.5 in Codex.

Source

"GPT-5.5 is the recommended choice for most Codex tasks when it appears in your model picker."

Codex changelog

Published

Open the sourcedevelopers.openai.com

Modelpeers tracks changes to AI agents and models, each from its source. Follow OpenAI Codex to get a weekly email when it changes.