OpenAI API Models o1 End of Life
Support dates and upgrade guidance — rebuilt from live data.
OpenAI API Models o1 reached end of life on 23 Oct 2026. It no longer receives security fixes.
Support timeline
Official dates from the OpenAI API Models release process.
| Milestone | Date | Status |
|---|---|---|
| Initial release | 5 Dec 2024 | 1y 11mo ago |
| Active support ended | 22 Apr 2026 | security fixes only after this |
| Deprecated support ended | 23 Oct 2026 | this month |
| Latest release | — | final |
Where to go from o1
Recommended target: OpenAI API Models gpt-6.1-terra.
The newest actively supported branch is OpenAI API Models gpt-6.1-terra (latest release ).
Frequently asked questions
Is OpenAI API Models o1 still safe to use?
OpenAI API Models o1 reached end of life on 23 Oct 2026, 11 days ago, and is no longer covered by standard support. Running it means no guaranteed security fixes.
Can I still download OpenAI API Models o1?
Yes — the final release (o1) generally remains available from vendor archives and OS package mirrors, but installing it means running software with known, unpatched vulnerabilities.
What should I upgrade OpenAI API Models o1 to?
Upgrade to OpenAI API Models gpt-6.1-terra, the newest actively supported branch.