Check saved Codex tasks after GPT-5.5 retires
GPT-5.5 retired from Codex with ChatGPT sign-in on October 14 at 19:00 UTC. OpenAI API access and Codex sessions authenticated with an API key are outside this retirement.
Source checked October 17, 2026
EDITORIAL TAKEAWAY
Review saved model choices in custom agents, scheduled tasks and scripts. Choose a replacement available to your plan, client and workspace, then try a familiar task.
Before you try it
- Applies to Codex sessions using ChatGPT sign-in, effective October 14, 2026 at noon PDT (19:00 UTC). It does not retire the model from the OpenAI API or API-key-authenticated Codex sessions.
- OpenAI points Plus, Pro, Business, Enterprise and Edu users to GPT-6.1 Sol when available. For Free and Go, it points to GPT-6 Luna in the desktop app when available.
- Replacement access depends on client, rollout and workspace controls. Enterprise and Edu administrators may need to enable a model.
A small next step
Our suggested way to explore the change.
- Look for saved gpt-5.5 selections in workspace defaults, custom agents, scheduled tasks and scripts.
- Select an available replacement and review any administrator requirements.
- Run a familiar task and check its result before relying on the updated setup.
Go to the source
OpenAI · GPT-5.5 retirement ↗OpenAI · Dated retirement changelog ↗Availability can change. Check the maker's current requirements before making a decision.