@ai-sdk/azure builds v1 URLs by default (useDeploymentBasedUrls: false), e.g. https://<resource>.openai.azure.com/openai/v1/responses. createAI only maps the deployment form (/openai/deployments/<d>/...), so a default Azure model can't be routed:

const azure = createAzure({ resourceName: "acme" });
const ai = createAI({ binding: env.AI, id: "gw" });
await generateText({ model: ai(azure("gpt-5")), prompt });
// TypeError: AI Gateway has no provider for acme.openai.azure.com. ... the supported providers are ..., azure-openai, ...

azureEndpoint in packages/agents/src/models/core/gateway-providers.ts returns undefined for anything but the deployment path, and the error then claims the host itself is unsupported while listing azure-openai. cloudflare/ai#604 maps /openai/v1/responses to the gateway's <resource>/openai/responses endpoint and leaves other v1 paths unmatched. At minimum the error should say to use useDeploymentBasedUrls: true.

From cloudflare/ai#604.