o1-preview

Retired · Language, Reasoning · Milestone · Primary source available

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

2024

2025

2026

As of 10 October 2026

Released +2Lifecycle · 12 Sep 2024

DeprecatedLifecycle · 28 Apr 2025

RetiredLifecycle · 28 Jul 2025

Successor o1Lineage · 5 Dec 2024

All events, in order

12 September 2024 Lifecycle Released
12 September 2024 Source Announcement published
12 September 2024 Source Blog post published
5 December 2024 Lineage Successor o1
28 April 2025 Lifecycle Deprecated
28 July 2025 Lifecycle Retired

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