diff --git a/vertexai/_genai/_evals_metric_handlers.py b/vertexai/_genai/_evals_metric_handlers.py
index 4571802dbc..2bd6349e47 100644
--- a/vertexai/_genai/_evals_metric_handlers.py
+++ b/vertexai/_genai/_evals_metric_handlers.py
@@ -1026,11 +1026,9 @@ def _build_request_payload(
             "instance": instance_payload,
         }
 
-        autorater_config = _get_autorater_config(self.metric)
-        if autorater_config:
-            request_payload["autorater_config"] = genai_types.AutoraterConfig(
-                **autorater_config
-            )
+        # Note: autorater_config is intentionally not passed for predefined
+        # metrics. The server uses its own model configuration for predefined
+        # metrics and ignores the autorater_config field.
         return request_payload
 
     @override
@@ -1045,7 +1043,6 @@ def get_metric_result(
                 lambda: self.module._evaluate_instances(
                     metrics=[self.metric],
                     instance=payload.get("instance"),
-                    autorater_config=payload.get("autorater_config"),
                 ),
                 metric_name,
             )