OpenAI · Model retirement
o4-mini
Stops working (tomorrow)
On October 23, 2026, the model o4-mini will be retired. Requests specifying model o4-mini will fail after that day. Applications relying on this model must be updated before the cutoff.
What to use instead of o4-mini
Move to gpt-5.6-terra, which is recommended by OpenAI.
Facts
- API
- OpenAI
api.openai.com - Model
o4-mini- Kind
- Model retirement
- Takes effect
- October 23, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
o4-mini on other APIs
- Azure OpenAI Stops working
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- ft-gpt-4.1-nano-2025-04-14 Stops working