Microsoft Foundry / Azure OpenAI · model
o3 deprecation: shutdown date & replacement
Shuts down November 19, 2026 — in 54 days
- Provider
- Microsoft Foundry / Azure OpenAI
- Name
- o3 (2025-04-16)
- Type
- model
- Announced
- —
- Shutdown
- Replacement
gpt-5.6-sol- Source
- Official Microsoft Foundry / Azure OpenAI notice
Azure lifecycle stage: Deprecated. Version 2025-04-16.
How to migrate off o3
- Find every place that references it:
grep -rn --exclude-dir={node_modules,.git,dist} "o3" . - Replace the model ID:
- model: "o3" + model: "gpt-5.6-sol" - Re-run your evals or a sample of real prompts — output style, token usage and pricing can change between models.
- Check config outside code too: environment variables, feature flags, prompt-management tools, and fine-tuned model references.
- Deploy before November 19, 2026, and add the CI scanner so it cannot come back.
Also shutting down on November 19, 2026 (Microsoft Foundry / Azure OpenAI)
Questions
Is o3 deprecated?
Yes. Microsoft Foundry / Azure OpenAI has deprecated o3. It shuts down on November 19, 2026.
When does o3 shut down?
November 19, 2026, according to Microsoft Foundry / Azure OpenAI's official deprecation notice.
What should I use instead of o3?
Microsoft Foundry / Azure OpenAI recommends gpt-5.6-sol. Switch the model ID and re-test your prompts, since outputs, pricing and limits can differ.
What happens to requests to o3 after the shutdown?
Requests using the retired model ID fail with an error, so any code still calling it breaks. Update and deploy before the shutdown date.