fix(bedrock): scope client_metadata drop to anthropic converse models

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

litellm/llms/bedrock/chat/converse_transformation.py

@@ -1324,7 +1324,13 @@ class AmazonConverseConfig(BaseConfig):
             )
 
         additional_request_params.pop("parallel_tool_calls", None)
-        additional_request_params.pop("client_metadata", None)
+
+        if base_model.startswith("anthropic") and additional_request_params.pop("client_metadata", None) is not None:
+            litellm.verbose_logger.debug(
+                "Bedrock Converse: dropping `client_metadata` for model=%s, Anthropic rejects it with "
+                "'client_metadata: Extra inputs are not permitted'",
+                model,
+            )
 
         # Only set the topK value in for models that support it
         additional_request_params.update(self._handle_top_k_value(model, inference_params, drop_params))

tests/test_litellm/llms/bedrock/chat/test_converse_transformation.py

@@ -979,8 +979,9 @@ def test_config_blocks_do_not_leak_into_inference_config():
     assert data["serviceTier"] == {"type": "priority"}
 
 
-def test_client_metadata_stripped_from_converse_request():
-    """``client_metadata`` sent by codex must not reach Bedrock as a passthrough model field.
+@pytest.mark.parametrize("model", ["anthropic.claude-opus-4-8", "us.anthropic.claude-opus-4-8"])
+def test_client_metadata_stripped_for_anthropic_converse_request(model):
+    """``client_metadata`` sent by codex must not reach Anthropic as a passthrough model field.
 
     Converse forwards ``additionalModelRequestFields`` verbatim to the model, and Anthropic
     rejects the request with "client_metadata: Extra inputs are not permitted".
@@ -988,7 +989,7 @@ def test_client_metadata_stripped_from_converse_request():
     config = AmazonConverseConfig()
 
     data = config._transform_request_helper(
-        model="anthropic.claude-opus-4-8",
+        model=model,
         system_content_blocks=[],
         optional_params={
             "maxTokens": 16,
@@ -1003,6 +1004,23 @@ def test_client_metadata_stripped_from_converse_request():
     assert fields["anthropic_beta"] == ["computer-use-2025-01-24"]
 
 
+def test_client_metadata_kept_for_non_anthropic_converse_request():
+    """Only Anthropic is known to reject ``client_metadata``, so other families keep the passthrough."""
+    config = AmazonConverseConfig()
+
+    data = config._transform_request_helper(
+        model="amazon.nova-pro-v1:0",
+        system_content_blocks=[],
+        optional_params={
+            "maxTokens": 16,
+            "client_metadata": {"originator": "codex_cli_rs"},
+        },
+        messages=None,
+    )
+
+    assert data["additionalModelRequestFields"]["client_metadata"] == {"originator": "codex_cli_rs"}
+
+
 def test_parallel_tool_calls_config_kept_for_sonnet_5(monkeypatch):
     old_env = os.environ.get("LITELLM_LOCAL_MODEL_COST_MAP")
     old_cost = litellm.model_cost