The model claude-sonnet-4-6 is not available on your foundry deployment.

Question

I had add the claude-sonnet-4-6 & claude-sonnet-4-5 in Foundry page ;

Answer 1

Hello Hongwei Yu,

Thanks for reaching out to Microsoft Q&A,

It looks like you’ve successfully added claude-sonnet-4-6 / 4-5 in Azure AI Foundry, and the portal shows Succeeded, but when calling from VS Code you get:

“The model claude-sonnet-4-6 is not available on your Foundry deployment.”

This typically means the issue is not deployment itself, but a mismatch between:

• Deployment vs API usage
• Environment (region/subscription)
• Or client configuration (VS Code)

There are four main categories where things break in this scenario:

1) Deployment Name vs Model Name

Even though you see: Model - claude-sonnet-4-6

APIs do not use the model name

They use the deployment name (the “Name” column in your screenshot).

What to check

Go to Foundry → Models → Deployments

Copy the exact deployment name, then use:

"model": "<your-deployment-name>"

NOT:

"model": "claude-sonnet-4-6"

2. Subscription & Region Constraints

Claude models in Foundry are not globally available.

Requirements:

Paid Azure subscription

Supported regions:

• East US 2
• Sweden Central

If your resource is in another region deployment may show “Succeeded” but won’t be callable

3) Deployment Type & Readiness

There are two ways models appear in Foundry:

• “Added” in catalog
• “Deployed” + READY

Please verify

• Go to Models → Models from partners
• Select Claude Sonnet 4.6 (Global standard)
• Click Deploy
• Wait until status - READY

“Succeeded” alone isn’t always enough ensure it’s actually serving

4) Endpoint Configuration

When using Claude via Foundry, your endpoint must include Anthropic routing:

https://<your-resource>.services.ai.azure.com/anthropic

If your VS Code config is pointing to:

• OpenAI endpoint
• Anthropic direct API

It won’t find your deployment

5) Permissions / Access Control

Even if deployment is correct, access can fail silently.

Ensure Role assigned Contributor OR Owner on resource

If using Entra ID Assign Cognitive Services User role via Microsoft Entra ID

6. SDK / VS Code Compatibility

Some VS Code extensions:

• Expect OpenAI-style APIs
• Don’t fully support multi-provider routing in Foundry

Model exists - but tool says “not available”

How to confirm

Test outside VS Code:

• Python SDK (azure-ai-projects)
• Postman / REST

If it works there issue is with VS Code extension, not Foundry

7. Validate via SDK

models = client.models.list()

If your deployment is not listed it’s not exposed to your runtime context

8. Check Deployment Logs

Go to Foundry → Jobs → Deployment Jobs

Look for Region mismatch, Permission errors, Provisioning failures

Please refer this

Subscription type & region support for Claude: https://learn.microsoft.com/azure/foundry/foundry-models/how-to/use-foundry-models-claude#subscription-type-and-region-support

Common troubleshooting for Claude in Foundry: https://learn.microsoft.com/azure/foundry/foundry-models/how-to/use-foundry-models-claude#troubleshooting

I Hope this helps. Do let me know if you have any further queries.

Thank you!