Azure AI Foundry
gpt-5.3-chat model retirement
Stopped working
On June 29, 2026, model gpt-5.3-chat will be retired. Calls targeting this model will fail after that day. Ensure your integrations are updated before the retirement date to avoid service disruption.
What to use instead of gpt-5.3-chat
The model gpt-chat-latest is named first as a replacement, but it stops working on November 17, 2026. No permanent replacement has been named yet.
Facts
- API
- Azure AI Foundry
*.services.ai.azure.com - Model
gpt-5.3-chat- Kind
- Model retirement
- Takes effect
- June 29, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
- Verified
- , against Azure AI Foundry's own pages
Questions
When does gpt-5.3-chat shut down?
Calls to the model gpt-5.3-chat on Azure AI Foundry stopped working on June 29, 2026.
What happens to calls after June 29, 2026?
They have failed since June 29, 2026.
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.
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You fixed this one by hand.
Okapi opens the pull request with the fix before the next breaking change reaches your code.