Azure AI Foundry
o4-mini model retirement
Stops workingSubscribe to Azure AI FoundryShare
On November 19, 2026, model o4-mini will be retired. Calls targeting model o4-mini will fail after that day. The model version 2025-04-16 is deprecated ahead of this shutdown date.
What to use instead of o4-mini
Move to gpt-5.6-terra, recommended by Microsoft.
In Azure AI Foundry's words
Model: o4-mini; Version: 2025-04-16; Lifecycle: Deprecated; Retirement date: 2026-11-19; Replacement: gpt-5.6-terra
Facts
- API
- Azure AI Foundry
*.services.ai.azure.com - Model
o4-mini- Released
- April 16, 2025 (models.dev)
- Kind
- Model retirement
- Takes effect
- November 19, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
- Verified
- , against Azure AI Foundry's own pages
Questions
When does o4-mini shut down?
Calls to the model o4-mini on Azure AI Foundry stop working on November 19, 2026.
What happens to calls after November 19, 2026?
They fail from that day.
When was o4-mini released?
o4-mini was released on April 16, 2025, according to models.dev.
How do I find the calls this hits in my code?
Okapi reads your repository, finds the calls this change hits and opens a pull request with the fix. It never commits to your branches: every change comes as a pull request you review.
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Is your code calling this?
Okapi finds the calls this change hits in your repo and opens the pull request with the fix before November 19, 2026.