diff --git a/packages/opencode/src/provider/provider.ts b/packages/opencode/src/provider/provider.ts
index 2b1b53c231..5ac916e412 100644
--- a/packages/opencode/src/provider/provider.ts
+++ b/packages/opencode/src/provider/provider.ts
@@ -277,7 +277,7 @@ function custom(dep: CustomDep): Record<string, CustomLoader> {
         },
       }
     }),
-    "azure-cognitive-services": Effect.fnUntraced(function* () {
+    "azure-cognitive-services": Effect.fnUntraced(function* (provider: Info) {
       const resourceName = yield* dep.get("AZURE_COGNITIVE_SERVICES_RESOURCE_NAME")
       return {
         autoload: false,
@@ -285,7 +285,9 @@ function custom(dep: CustomDep): Record<string, CustomLoader> {
           return selectAzureLanguageModel(sdk, modelID, Boolean(options?.["useCompletionUrls"]))
         },
         options: {
-          baseURL: resourceName ? `https://${resourceName}.cognitiveservices.azure.com/openai` : undefined,
+          baseURL: resourceName
+            ? `https://${resourceName}.cognitiveservices.azure.com/openai${provider.options?.useDeploymentBasedUrls ? "" : "/v1"}`
+            : undefined,
         },
       }
     }),