Model retirement dates / OpenAI
o1-preview
OpenAI retired o1-preview on 28 July 2025. API calls to it now fail. The recommended replacement is o3 (which is itself retiring; move to gpt-5.6-sol).
| Provider | OpenAI |
|---|---|
| Status | Retired (as of 11 Nov 2026) |
| Shutdown | 28 July 2025 |
| Replacement | o3 → move to gpt-5.6-sol |
| Model type | Text |
| Announced | 28 April 2025 |
| Source | OpenAI deprecations page |
Before you switch
A replacement model answers the same prompt differently: tone, length, format, and whether JSON still parses. Driftline Pro runs your real prompts on gpt-5.6-sol in CI, so you see the new answers before you ship the switch. See a drift test.
Check your code for it
Run this in your repository. No install and no API key; it lists every OpenAI, Anthropic and Google model ID it finds, with its retirement date and replacement:
npx -y @aidriftline/driftline .Or look for this ID only: grep -rn "o1-preview" . (misses aliases, Bedrock and Vertex names, and IDs split across lines).
To be warned automatically before the next retirement, add the free Driftline GitHub Action. It annotates the exact line in pull requests and can fail the build on retired models.
Checked against OpenAI's official page on 11 November 2026. Something wrong? hello@aidriftline.com