OpenAI
o4-mini-2025-04-16
☠ Dead
Yes. o4-mini-2025-04-16 was shut down on October 23, 2026. Requests to it fail.
Recommended replacement: gpt-5.6-terra
Source: OpenAI deprecation page.
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Or one line in a terminal or in CI (fails if a dead ID is found): curl -sL https://lira-ia.github.io/model-check/check.py | python3 - . · GitHub Action · email me before it dies