# gpt-5-chat

Calls to the model gpt-5-chat on Azure AI Foundry stopped working on May 13, 2026.

On May 13, 2026, model gpt-5-chat was retired on Azure AI Foundry. Calls using this model fail since that date. The change affects version 2025-10-03 directly.

## What to use instead

Migrate to gpt-chat-latest, which is named first, though it stops working on November 17, 2026. No replacement that holds is named yet.

- API: Azure AI Foundry (*.services.ai.azure.com)
- Model: gpt-5-chat
- Released: August 7, 2025 (models.dev)
- Kind: Model retirement
- Takes effect: May 13, 2026
- Calls after that day: fail
- Calls it hits: `model gpt-5-chat`
- 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/gpt-5-chat/

## Azure AI Foundry's words

> Model: gpt-5-chat; Version: 2025-10-03; Lifecycle: Retired; Retirement date: 2026-05-13; Replacement: gpt-chat-latest

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