o3-mini

Deprecated · Language, Reasoning · Primary source available

Lifecycle
Milestone or variant
Related model
Source event
AI Radar coverage
Only month or year known
10 events

2024

2025

2026

As of 10 October 2026

Announced +1Lifecycle · 20 Dec 2024

Released +2Lifecycle · 31 Jan 2025

DeprecatedLifecycle · 22 Apr 2026

Predecessor o1-miniLineage · 12 Sep 2024

Successor o4-miniLineage · 16 Apr 2025

Derived Phi-4-reasoningLineage · 30 Apr 2025

Announcement archivedSource · 14 Sep 2026

All events, in order

12 September 2024 Lineage Predecessor o1-mini
20 December 2024 Lifecycle Announced
20 December 2024 Source Announcement published
31 January 2025 Lifecycle Released
31 January 2025 Source Announcement published
31 January 2025 Source System card published
16 April 2025 Lineage Successor o4-mini
30 April 2025 Lineage Derived Phi-4-reasoning
22 April 2026 Lifecycle Deprecated
14 September 2026 Source Announcement archived

← The full record of o3-mini, with every claim and its sources