Model release · curated entry
o3 and o4-mini make reasoning models tool-capable
Introducing OpenAI o3 and o4-mini
- Date
- April 16, 2025
- Category
- Model release
- Organization / Model
- OpenAI
- Evidence
- 1 source · 1 evidence family
OpenAI folded image reasoning and tool calling into its reasoning models. The two models cover different cost bands and widen where reasoning models get used.
Curator's note: Cross-checked against OpenAI's official announcement page.
Curated sources · 1
Cite this page
This page is a curated static snapshot and can be cited directly. Preferred format GB/T 7714—2025 (electronic resource [EB/OL]); the other 5 styles open below, together with the machine-readable files.
GB/T 7714—2025 (electronic resource [EB/OL])
AI 纪年. OpenAI 发布 o3 与 o4-mini，推理模型进入工具化阶段[EB/OL]. (2025-04-16)[2026-11-03]. https://aihist.net/e/o3-2025.html.
APA 7 · American Psychological Association
AI 纪年. (2025, April 16). OpenAI 发布 o3 与 o4-mini，推理模型进入工具化阶段 [Web page]. https://aihist.net/e/o3-2025.html
MLA 9 · Modern Language Association
"OpenAI 发布 o3 与 o4-mini，推理模型进入工具化阶段." AI 纪年, 16 April 2025, aihist.net/e/o3-2025.html. Accessed 3 Nov. 2026.
Chicago 17 · notes-bibliography
AI 纪年. "OpenAI 发布 o3 与 o4-mini，推理模型进入工具化阶段." Published April 16, 2025. Accessed Nov. 3, 2026. https://aihist.net/e/o3-2025.html.
IEEE · citation-reference list
"OpenAI 发布 o3 与 o4-mini，推理模型进入工具化阶段," AI 纪年, 16 Apr. 2025. [Online]. Available: https://aihist.net/e/o3-2025.html. [Accessed: 3 Nov. 2026].
ACM · author-date variant
AI 纪年. April 16, 2025. OpenAI 发布 o3 与 o4-mini，推理模型进入工具化阶段. Retrieved November 3, 2026 from https://aihist.net/e/o3-2025.html.
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