diff --git a/api/controllers/console/workspace/models.py b/api/controllers/console/workspace/models.py
index a5b45ef514..2def57ed7b 100644
--- a/api/controllers/console/workspace/models.py
+++ b/api/controllers/console/workspace/models.py
@@ -282,9 +282,10 @@ class ModelProviderModelCredentialApi(Resource):
                 tenant_id=tenant_id, provider_name=provider
             )
         else:
-            model_type = args.model_type
+            # Normalize model_type to the origin value stored in DB (e.g., "text-generation" for LLM)
+            normalized_model_type = args.model_type.to_origin_model_type()
             available_credentials = model_provider_service.provider_manager.get_provider_model_available_credentials(
-                tenant_id=tenant_id, provider_name=provider, model_type=model_type, model_name=args.model
+                tenant_id=tenant_id, provider_name=provider, model_type=normalized_model_type, model_name=args.model
             )
 
         return jsonable_encoder(