# o1

Calls to the model o1 on Azure AI Foundry stop working on November 19, 2026.

On November 19, 2026, model o1 will be retired. Calls to model o1 will fail after this date. If your integrations rely on this model, update them before the retirement day.

## What to use instead

Move to gpt-5.6-sol, which is recommended by Microsoft.

- API: Azure AI Foundry (*.services.ai.azure.com)
- Model: o1
- Kind: Model retirement
- Takes effect: November 19, 2026
- Calls after that day: fail
- Calls it hits: `model o1`
- 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/o1/

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