GPT-5.5 retires from Codex sessions signed in with ChatGPT
The retirement takes effect at 19:00 UTC on October 14; API-key sessions and the OpenAI API are unaffected.
retirement in effect
Facts, analysis and limits
Verified facts
- Recommended replacement: GPT-6.1 Sol if available for the plan and client.
- Update saved model selections, agents, scripts, tasks and managed configurations.
What changes
Subscription authenticated Codex workflows must migrate.
Practical implication
Search for gpt-5.5 references and check a task after migration.
Availability
Belgium/EEA: not specified in the source; access depends on the plan, rollout and administrator settings.
Limits and uncertainty
An actual October event announced earlier in September; this is not a closing of the model in the API.