diff --git a/py/src/braintrust/integrations/pydantic_ai/test_pydantic_ai_integration.py b/py/src/braintrust/integrations/pydantic_ai/test_pydantic_ai_integration.py
index e721d0af..42f4052a 100644
--- a/py/src/braintrust/integrations/pydantic_ai/test_pydantic_ai_integration.py
+++ b/py/src/braintrust/integrations/pydantic_ai/test_pydantic_ai_integration.py
@@ -965,10 +965,13 @@ async def test_agent_with_model_settings_in_metadata(memory_logger):
     assert chat_settings["max_tokens"] == 100
     assert chat_settings["temperature"] == 0.5
 
-    # Verify model_settings is NOT in chat metadata (it's in input)
+    assert chat_span["span_attributes"]["type"] == SpanTypeAttribute.LLM
+    invocation_params = chat_span["metadata"]["invocation_params"]
+    assert invocation_params["max_tokens"] == 100
+    assert invocation_params["temperature"] == 0.5
+
     assert "model_settings" not in chat_span["metadata"], "model_settings should NOT be in chat span metadata"
 
-    # Verify other metadata is present
     assert chat_span["metadata"]["model"] == "gpt-4o-mini"
     assert chat_span["metadata"]["provider"] == "openai"
 
diff --git a/py/src/braintrust/integrations/pydantic_ai/tracing.py b/py/src/braintrust/integrations/pydantic_ai/tracing.py
index 280c0057..3058d104 100644
--- a/py/src/braintrust/integrations/pydantic_ai/tracing.py
+++ b/py/src/braintrust/integrations/pydantic_ai/tracing.py
@@ -364,6 +364,8 @@ def _build_model_class_input_and_metadata(instance: Any, args: Any, kwargs: Any)
         input_data["model_settings"] = model_settings
 
     metadata = _build_model_metadata(model_name, provider, model_settings=None)
+    if model_settings is not None:
+        metadata["invocation_params"] = model_settings
 
     return model_name, display_name, input_data, metadata