Modelpeers
OpenAI Codex character

GPT-5.5, OpenAI Codex and ChatGPT

3 products from OpenAI

Retired

GPT-5.5 retired from Codex and ChatGPT

At noon PDT (19:00 UTC) on October 14, 2026, GPT-5.5 retired from Codex for ChatGPT sign-in. Replacements are GPT-6.1 Sol on paid plans and GPT-6 Luna on Free and Go. API-key sessions are not affected.

Who is affected:
Codex and ChatGPT users and scheduled tasks that selected GPT-5.5.
Action needed:
Replace gpt-5.5 with gpt-6.1-sol in defaults, custom agents, scheduled tasks and scripts.

Source

"Effective October 14, 2026, at noon PDT (19:00 UTC), GPT-5.5 retires from Codex for users signed in with ChatGPT."

Codex changelog

Published

Open the sourcedevelopers.openai.com

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