[FEATURE]: Add support for Anthropic models in Azure AI Foundry

[CarlosGtrz]

Feature hasn't been suggested before.

• [x] I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Anthropic models are now available in Azure AI Foundry. Reference: https://code.claude.com/docs/en/azure-ai-foundry

[rekram1-node]

Yep we should do that, basically just means updating: https://github.com/sst/models.dev

[cau1k]

Looking into this now - added support in sst/models.dev#405 but unable to use the claude models yet. Wondering if we should wait for ai-sdk/azure support for @anthropic-ai/foundry-sdk or just add a switch for the time being.

[rekram1-node]

u can override the npm package per model if u need to:

[provider] npm = “…”

[cau1k]

u can override the npm package per model if u need to:

[provider] npm = “…”

Thanks - fixed in sst/models.dev#409

[krishna1s]

is this available with latest opencode version 1.0.80

[rekram1-node]

@krishna1s should be you just need to restart opencode a couple of times to refresh ur cache

[krishna1s]

@rekram1-node I can see now azure/claude-sonnet-4-5, is there any way to clean the cache. Also would opencode auth login with azure, going to support foundry key or we need to set env as suggested here

[rekram1-node]

is there any way to clean the cache

rm ~/.cache/opencode/models.json

Uh idk I didn't set it up but i can take a look when I get a chance

[krishna1s]

I tried configuring anthropic env variable but it doesn't seems to be working

[cau1k]

@krishna1s this works, just set the envs to your foundry creds (base url: https://{resource-name}.services.ai.azure.com/anthropic/v1)

{
  "provider": {
    "azure": {
      "models": {
        "claude-haiku-4-5": {
          "id": "claude-haiku-4-5",
          "provider": {
            "npm": "@ai-sdk/anthropic",
            "options": {
              "apiKey": "{env:ANTHROPIC_FOUNDRY_API_KEY}",
              "baseURL": "{env:ANTHROPIC_FOUNDRY_BASE_URL}"
            }
          }
        }
      }
    }
  }
}

[edisonpaul4]

This is very important :)

[edisonpaul4]

@krishna1s this works, just set the envs to your foundry creds (base url: https://{resource-name}.services.ai.azure.com/anthropic/v1)

{ "provider": { "azure": { "models": { "claude-haiku-4-5": { "id": "claude-haiku-4-5", "provider": { "npm": "@ai-sdk/anthropic", "options": { "apiKey": "{env:ANTHROPIC_FOUNDRY_API_KEY}", "baseURL": "{env:ANTHROPIC_FOUNDRY_BASE_URL}" } } } } } } }

Didnt work for me.

` INFO 2025-11-21T14:49:36 +0ms service=session.prompt sessionID=ses_5591ba16affeJMoRrZpI0kg4cr cancel INFO 2025-11-21T14:49:36 +1ms service=bus type=session.status publishing INFO 2025-11-21T14:49:36 +0ms service=bus type=session.idle publishing 68 | autoload: false, 69 | async getModel(sdk: any, modelID: string, options?: Record<string, any>) { 70 | if (options?.["useCompletionUrls"]) { 71 | return sdk.chat(modelID) 72 | } else { 73 | return sdk.responses(modelID) ^ TypeError: sdk.responses is not a function. (In 'sdk.responses(modelID)', 'sdk.responses' is undefined) at (src/provider/provider.ts:73:24) at getModel (src/provider/provider.ts:69:34) at getModel (src/provider/provider.ts:584:26)

INFO 2025-11-21T14:49:36 +0ms service=provider status=completed duration=43 providerID=azure getSDK ERROR 2025-11-21T14:49:36 +1ms service=acp-command promise={} reason=sdk.responses is not a function. (In 'sdk.responses(modelID)', 'sdk.responses' is undefined) Unhandled rejection ERROR 2025-11-21T14:49:36 +0ms service=default e=sdk.responses is not a function. (In 'sdk.responses(modelID)', 'sdk.responses' is undefined) rejection INFO 2025-11-21T14:49:36 +3ms service=default directory=/home/edisonpaul4 disposing instance INFO 2025-11-21T14:49:36 +0ms service=state key=/home/edisonpaul4 waiting for state disposal to complete INFO 2025-11-21T14:49:36 +1ms service=state key=/home/edisonpaul4 state disposal completed `

[cau1k]

@edisonpaul4 try using the anthropic provider with the same env. Had the same issue on my system but it works fine in a fresh environment https://github.com/cau1k/anthropic-foundry-opencode

[edisonpaul4]

@edisonpaul4 try using the anthropic provider with the same env. Had the same issue on my system but it works fine in a fresh environment https://github.com/cau1k/anthropic-foundry-opencode

Not working

INFO 2025-11-24T12:38:57 +0ms service=provider providerID=azure-custom pkg=@ai-sdk/anthropic using preinstalled provider INFO 2025-11-24T12:38:57 +43ms service=provider status=completed duration=43 providerID=azure-custom getSDK INFO 2025-11-24T12:38:57 +0ms service=provider status=completed duration=43 providerID=azure-custom getSDK INFO 2025-11-24T12:38:57 +0ms service=provider providerID=azure-custom modelID=claude-haiku-4-5 found INFO 2025-11-24T12:38:57 +0ms service=provider providerID=azure-custom modelID=claude-haiku-4-5 found INFO 2025-11-24T12:38:57 +7ms service=bus type=message.updated publishing ERROR 2025-11-24T12:38:57 +3ms service=session.prompt error=Anthropic API key is missing. Pass it using the 'apiKey' parameter or the ANTHROPIC_API_KEY environment variable. model=claude-haiku-4-5 failed to generate title INFO 2025-11-24T12:38:57 +6ms service=bash-tool shell=/bin/bash bash tool using shell INFO 2025-11-24T12:38:57 +5ms service=session.processor process INFO 2025-11-24T12:38:57 +3ms service=bus type=session.status publishing ERROR 2025-11-24T12:38:57 +1ms service=session.prompt error={"error":{"name":"AI_LoadAPIKeyError"}} stream error ERROR 2025-11-24T12:38:57 +2ms service=session.processor error=Anthropic API key is missing. Pass it using the 'apiKey' parameter or the ANTHROPIC_API_KEY environment variable. process INFO 2025-11-24T12:38:57 +0ms service=bus type=session.error publishing INFO 2025-11-24T12:38:57 +1ms service=bus type=message.updated publishing INFO 2025-11-24T12:38:57 +0ms service=session.compaction pruning Error: Anthropic API key is missing. Pass it using the 'apiKey' parameter or the ANTHROPIC_API_KEY environment variable. INFO 2025-11-24T12:38:57 +4ms service=session.prompt sessionID=ses_54a20280cffeTuZLqvjlf6Crcw cancel INFO 2025-11-24T12:38:57 +0ms service=bus type=session.status publishing INFO 2025-11-24T12:38:57 +0ms service=bus type=session.idle publishing INFO 2025-11-24T12:38:57 +2ms service=bus type=message.updated publishing ERROR 2025-11-24T12:38:57 +1ms service=acp-command promise={} reason=Anthropic API key is missing. Pass it using the 'apiKey' parameter or the ANTHROPIC_API_KEY environment variable. Unhandled rejection ERROR 2025-11-24T12:38:57 +0ms service=default e=Anthropic API key is missing. Pass it using the 'apiKey' parameter or the ANTHROPIC_API_KEY environment variable. rejection INFO 2025-11-24T12:38:57 +0ms service=bus type=session.updated publishing INFO 2025-11-24T12:38:57 +0ms service=bus type=session.diff publishing INFO 2025-11-24T12:38:57 +0ms service=session.compaction pruned=0 total=0 found

and this is my opencode.json (took your and just kept what i needed)

{ "$schema": "https://opencode.ai/config.json", "provider": { "azure-custom": { "models": { "claude-haiku-4-5": { "id": "claude-haiku-4-5", "provider": { "npm": "@ai-sdk/anthropic", "options": { "apiKey": "{env:ANTHROPIC_FOUNDRY_API_KEY}", "baseURL": "{env:ANTHROPIC_FOUNDRY_BASE_URL}" } }, "options": { "thinking": { "type": "enabled", "budgetTokens": 16000, } }, }, "claude-sonnet-4-5": { "id": "claude-sonnet-4-5", "provider": { "npm": "@ai-sdk/anthropic", "options": { "apiKey": "{env:ANTHROPIC_FOUNDRY_API_KEY}", "baseURL": "{env:ANTHROPIC_FOUNDRY_BASE_URL}" } }, "options": { "thinking": { "type": "enabled", "budgetTokens": 16000, } }, }, } }, } }

[niusnet]

Hello, this configuration works according to my tests

{
	"$schema": "https://opencode.ai/config.json",
	"provider": {
		"azure-anthropic": {
			"name": "Azure AI Foundry (Anthropic)",
			"npm": "@ai-sdk/anthropic",
			"api": "{env:ANTHROPIC_FOUNDRY_BASE_URL}",
			"env": ["ANTHROPIC_FOUNDRY_API_KEY"],
			"models": {
				"claude-sonnet-4-5": {
					"id": "claude-sonnet-4-5",
					"name": "Claude Sonnet 4.5",
					"tool_call": true,
					"attachment": true,
					"reasoning": true,
					"temperature": true,
					"options": {
						"thinking": {
							"type": "enabled",
							"budgetTokens": 16000
						}
					}
				},
				"claude-haiku-4-5": {
					"id": "claude-haiku-4-5",
					"name": "Claude Haiku 4.5",
					"tool_call": true,
					"attachment": true,
					"reasoning": true,
					"temperature": true,
					"options": {
						"thinking": {
							"type": "enabled",
							"budgetTokens": 16000
						}
					}
				}
			}
		}
	}
}

[cloonix]

Hello, this configuration works according to my tests [...]

I can confirm. Worked for me.

[krishna1s]

Does it work irrespective of foundry deployment name ?

[niusnet]

Yes, it works regardless of the Foundry deployment name.

The resource URL is configured through an environment variable like ANTHROPIC_FOUNDRY_BASE_URL, where you set the full URL of your resource:

https://[RESOURCE_NAME].services.ai.azure.com/anthropic/v1

So the deployment name itself doesn't matter what matters is that the base URL points to your specific Azure AI Foundry resource.

[rekram1-node]

do we need to update models.dev was it incorrect?

[cloonix]

The resource name can also be provided in opencode.json. The API-Key can be set in auth.json as well. That's my current setup. Thanks to the comment before.

  "provider": {
    "azure-anthropic": {
      "name": "Azure AI Foundry (Anthropic)",
      "npm": "@ai-sdk/anthropic",
      "api": "https://<RSN>.ai.azure.com/anthropic/v1",
      "models": {
        "claude-opus-4-5": {
          "id": "claude-opus-4-5",
          "name": "Claude Opus 4.5",
          "tool_call": true,
          "attachment": true,
          "reasoning": true,
          "temperature": true
        },
        "claude-sonnet-4-5": {
          "id": "claude-sonnet-4-5",
          "name": "Claude Sonnet 4.5",
          "tool_call": true,
          "attachment": true,
          "reasoning": true,
          "temperature": true
        }
      }

auth.json:

{
  "azure-anthropic": {
    "type": "api",
    "key": "xyz"
  }
}

[lasficw]

The resource name can also be provided in opencode.json. The API-Key can be set in auth.json as well. That's my current setup. Thanks to the comment before.

"provider": { "azure-anthropic": { "name": "Azure AI Foundry (Anthropic)", "npm": "@ai-sdk/anthropic", "api": "https://<RSN>.ai.azure.com/anthropic/v1", "models": { "claude-opus-4-5": { "id": "claude-opus-4-5", "name": "Claude Opus 4.5", "tool_call": true, "attachment": true, "reasoning": true, "temperature": true }, "claude-sonnet-4-5": { "id": "claude-sonnet-4-5", "name": "Claude Sonnet 4.5", "tool_call": true, "attachment": true, "reasoning": true, "temperature": true } }

auth.json:

{ "azure-anthropic": { "type": "api", "key": "xyz" } }

This works great in the Terminal but not on the Web UI for some reason. Has anybody found a workaround for that?

[bluet]

I'm having the issue with OpenCode 1.1.16 , is that opencode need to dump version of dependency, or this need to be configured manually?