OPENAI · MODEL
o1-mini was shut down on 27 October 2025
SHUT DOWN27 October 2025
SINCE355 days ago
REPLACE WITHo4-mini
Announced in: 2025-04-28: o1-preview and o1-mini.
OpenAI lists 27 October 2025 as the date it shut down for o1-mini, with o4-mini as the recommended replacement. Source: OpenAI's official deprecations page, checked 17 October 2026. Read the official page.
Checked against the official page on 17 October 2026 at 06:08 UTC
Announced in the same notice
| Shuts down | When | Model | Replace with | Source |
|---|---|---|---|---|
| 28 July 2025 | 446 days ago | o1-preview | o3 | Official |