OpenAI o4-mini · model releaseo4-mini

Valid from

2025-04-16

Valid until

still holds

Published

2025-04-16

Recorded by AsOf

2026-11-04

Checked

2026-11-04 · its source page states the value and the date

Confidence

0.95

Sources

“Apr 16 Feature v1/chat/completions v1/responses Added two new o-series reasoning models, o3 and o4-mini .”— what the page says, read 2026-11-04

• OpenAI API changelog, April 16, 2025primary · developers.openai.com · 2025-04-16

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