Azure AI Foundry
gpt-5.3-chat model retirement
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Model gpt-5.3-chat was retired on June 29, 2026. Calls to this model fail since that date. The retirement affected version 2026-03-03 of the model.
What to use instead of gpt-5.3-chat
The replacement is gpt-chat-latest, but it stops working on November 17, 2026. No replacement that holds is named yet.
In Azure AI Foundry's words
Model: gpt-5.3-chat; Version: 2026-03-03; Lifecycle: Retired; Retirement date: 2026-06-29; Replacement: gpt-chat-latest
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.