Model and API retirements

Within 30 days64Firm dates ahead558

64 within 30 days · 558 firm dates ahead

o4-mini-2025-04-16 retirement date and replacement

OpenAI API · Model · retired Oct 23, 2026 (17 days ago)

Vendor page

Dates

Checked Nov 9, 2026 on OpenAI's page
RetiredOct 23, 2026 (17 days ago)
AnnouncedApr 22, 2026
Replacementgpt-5.6-terra
What it iso4-mini-2025-04-16 stopped answering on OpenAI API.
Sourcedevelopers.openai.com/api/docs/deprecations

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