# gpt-4.1

Calls to the model gpt-4.1 on Azure OpenAI stop working on October 14, 2027.

- API: Azure OpenAI (*.openai.azure.com)
- Model: gpt-4.1
- Kind: Model retirement
- Takes effect: October 14, 2027
- Calls after that day: fail
- Calls it hits: `model gpt-4.1`
- Source: [Deprecations page](https://learn.microsoft.com/en-us/azure/ai-foundry/openai/concepts/model-retirements)
- Page: https://www.okapi.bot/models/azure-openai/gpt-4.1/