# o3

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

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

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

- 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
- Calls it hits: `model o3`
- Source: [Deprecations page](https://learn.microsoft.com/en-us/azure/foundry/openai/concepts/model-retirement-schedule)
- Verified: November 6, 2026, against Azure AI Foundry's own pages
- Page: https://www.okapi.bot/models/azure-ai-foundry/o3/

## Azure AI Foundry's words

> Model: o3; Version: 2025-04-16; Lifecycle: Deprecated; Retirement date: 2026-11-19; Replacement: gpt-5.6-sol

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