How To Use GPT-5 with Azure AI Search & Websearch in UK South

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If you’re facing issues connecting GPT-5 or GPT-5-mini models with Azure AI Search, you’re not alone. Many users encounter errors stating that Azure AI Search isn’t supported with these models. Here’s a simple step-by-step guide to help you work around these challenges and find solutions.

First, it’s important to recognize that directly integrating GPT-5 or GPT-5-mini with Azure AI Search might not be straightforward because these models don’t officially support adding your own data. If you’re using the GPT-5 Chat API with completion REST, you might find that it works with Azure AI Search as a data source, but the earlier models, like GPT-5, often throw errors about unsupported features.

One way to manage this is to focus on GPT-4.1 available through the completion API, which generally supports using Azure AI Search as a data source alongside web search capabilities. Currently, in the UK South region, GPT-4.1 tends to be more flexible in this regard.

Here’s what you can try:
– Use the GPT-4.1 completion API when you need both Azure AI Search and web search features in your project. This setup allows you to combine your local data with online search results effectively.
– Although GPT-5 models are appealing, their limitations mean that leveraging GPT-4.1 may be your best option for now until newer versions become fully compatible.

For detailed visuals, check the attached screenshots showing successful implementations with GPT-4.1. These can guide you through the setup process and clarify what works with your current region setup.

In summary, if working with GPT-5 series and Azure AI Search simultaneously proves tricky, switching to GPT-4.1 gives you a reliable and supported pathway. Keep an eye on updates from Microsoft’s AI services, as support for newer models may improve over time.