The Azure OpenAI server hosts a number of open source models as well as proprietary models from OpenAI. Built on top of chat_openai_compatible(). Authentication chat_azure_openai() supports API keys and the credentials parameter, but it also makes use of: Azure service principals (when the AZURE_TENANT_ID, AZURE_CLIENT_ID, and AZURE_CLIENT_SECRET environment variables are set). Interactive Entra ID authentication, like the Azure CLI. Viewer-based credentials on Posit Connect. Requires the connectcreds package.