# o3

Calls to the model o3 on Azure AI Foundry stop working on November 19, 2026.

On November 19, 2026, model o3 will be retired from Azure AI Foundry. Calls using model o3 will fail after this date. Applications relying on this model must be updated before the cutoff.

## What to use instead

Move to gpt-5.6-sol, which Microsoft recommends as the replacement.

- API: Azure AI Foundry (*.services.ai.azure.com)
- Model: o3
- Kind: Model retirement
- Takes effect: November 19, 2026
- Calls after that day: fail
- Calls it hits: `model o3`
- Source: [Deprecations page](https://learn.microsoft.com/en-us/azure/foundry/openai/concepts/model-retirement-schedule)
- Verified: October 29, 2026, against Azure AI Foundry's own pages
- Page: https://www.okapi.bot/models/azure-ai-foundry/o3/

Okapi finds the calls this change hits in your repo and opens the pull request with the fix: https://github.com/apps/okapi-agent