diff --git a/litellm/llms/anthropic/pass_through/messages/transformation.py b/litellm/llms/anthropic/pass_through/messages/transformation.py
index dbd04ad0098..13e49a80ade 100644
--- a/litellm/llms/anthropic/pass_through/messages/transformation.py
+++ b/litellm/llms/anthropic/pass_through/messages/transformation.py
@@ -425,7 +425,7 @@ class AnthropicMessagesConfig(BaseAnthropicMessagesConfig):
                     ),
                     status_code=400,
                 )
-            existing_output_config: Final = optional_params.get("output_config")
+            existing_output_config: Final[object] = optional_params.get("output_config")
             explicit_effort: Final = AnthropicMessagesConfig._explicit_output_config_effort(existing_output_config)
             resolved_effort: Final = (
                 explicit_effort
diff --git a/litellm/llms/bedrock/messages/invoke_transformations/anthropic_claude3_transformation.py b/litellm/llms/bedrock/messages/invoke_transformations/anthropic_claude3_transformation.py
index 89b0eb29d3f..fdd2a50b09d 100644
--- a/litellm/llms/bedrock/messages/invoke_transformations/anthropic_claude3_transformation.py
+++ b/litellm/llms/bedrock/messages/invoke_transformations/anthropic_claude3_transformation.py
@@ -674,7 +674,7 @@ class AmazonAnthropicClaudeMessagesConfig(
         normalize_bedrock_opus_output_config_effort(model=model, output_config=clamped)
         optional_params["reasoning_effort"] = clamped["effort"]
         explicit_effort: Final = AnthropicMessagesConfig._explicit_output_config_effort(
-            optional_params.get("output_config")
+            cast(object, optional_params.get("output_config"))  # cast-ok: optional_params is an untyped dict
         )
         if explicit_effort is None:
             return