Running Anthropic models on Azure Foundry results in 404 error #1331
Description
Describe the bug
Running cagent with an anthropic model in Azure foundry fails with 404.
Azure requires the model name to be e.g. claude-haiku-4-5 but what ends up getting sent to the Azure API is claude-haiku-4-5-20251001 and results in:
error receiving from stream: POST "https://<foundry-project>.ai.azure.com/anthropic/v1/messages": 404 Not Found
{"error":{"code":"DeploymentNotFound","message":"The API deployment claude-haiku-4-5-20251001 does not exist. If you created the deployment within the last 5 minutes,
please wait a moment and try again.","details":"The API deployment claude-haiku-4-5-20251001 does not exist. If you created the deployment within the last 5 minutes,
please wait a moment and try again."}}
This works with v1.18.7
I think the following commit broke running anthropic models on azure foundry:
21e2e4d
Specifically, the call to config.ResolveModelAliases(ctx, cfg) in pkg/teamloader.go:
https://github.com/docker/cagent/blob/main/pkg/teamloader/teamloader.go#L89
Version affected
Please include the version of the software that you are using.
v1.18.8
How To Reproduce
Detailed steps to reproduce the behavior:
Create a basic agent:
#!/usr/bin/env cagent run
version: "2"
agents:
root:
model: azure-haiku
description: A helpful AI assistant
instruction: |
You are a knowledgeable assistant that helps users with various tasks.
Be helpful, accurate, and concise in your responses.
models:
azure-haiku:
provider: anthropic
model: claude-haiku-4-5
base_url: https://<azure-foundry>.services.ai.azure.com/anthropicSet up claude-haiku-4-5 model in Azure Foundry.
Set the ANTHROPIC_API_KEY env var.
Run:
cagent run basic.yml "What's 2+2?"Expectation
Expected to see the AI respond to the question and not respond with a 404
OS and Terminal type
macOS 26.1 (25B78) - Warp.dev
Additional context
I'm happy to contribute to fix this issue with a bit of guidance.
