diff --git a/pydantic_ai_slim/pydantic_ai/profiles/amazon.py b/pydantic_ai_slim/pydantic_ai/profiles/amazon.py
index 8cac0f11d..f989e1813 100644
--- a/pydantic_ai_slim/pydantic_ai/profiles/amazon.py
+++ b/pydantic_ai_slim/pydantic_ai/profiles/amazon.py
@@ -6,4 +6,6 @@
 
 def amazon_model_profile(model_name: str) -> ModelProfile | None:
     """Get the model profile for an Amazon model."""
-    return ModelProfile(json_schema_transformer=InlineDefsJsonSchemaTransformer)
+    return _AMAZON_MODEL_PROFILE  # Reuse a singleton
+
+_AMAZON_MODEL_PROFILE = ModelProfile(json_schema_transformer=InlineDefsJsonSchemaTransformer)