Azure AI Foundry
o3 model retirement
Stops workingSubscribe to Azure AI FoundryShare
On November 19, 2026, the model o3 will be retired. Calls specifying this model will fail after that date. The change affects all requests targeting model o3.
What to use instead of o3
Move to gpt-5.6-sol, which is recommended by Microsoft.
In Azure AI Foundry's words
Model: o3; Version: 2025-04-16; Lifecycle: Deprecated; Retirement date: 2026-11-19; Replacement: gpt-5.6-sol
Facts
- API
- Azure AI Foundry
*.services.ai.azure.com - Model
o3- 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 o3 shut down?
Calls to the model o3 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 o3 released?
o3 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.
o3 on other APIs 1
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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.