diff --git a/google/genai/_interactions/types/usage.py b/google/genai/_interactions/types/usage.py
index 5bfeafd10..06b1ab9fb 100644
--- a/google/genai/_interactions/types/usage.py
+++ b/google/genai/_interactions/types/usage.py
@@ -93,7 +93,7 @@ class Usage(BaseModel):
     total_output_tokens: Optional[int] = None
     """Total number of tokens across all the generated responses."""
 
-    total_reasoning_tokens: Optional[int] = None
+    total_thought_tokens: Optional[int] = None
     """Number of tokens of thoughts for thinking models."""
 
     total_tokens: Optional[int] = None
diff --git a/google/genai/_interactions/types/usage_param.py b/google/genai/_interactions/types/usage_param.py
index 355c4d508..f18d07457 100644
--- a/google/genai/_interactions/types/usage_param.py
+++ b/google/genai/_interactions/types/usage_param.py
@@ -93,7 +93,7 @@ class UsageParam(TypedDict, total=False):
     total_output_tokens: int
     """Total number of tokens across all the generated responses."""
 
-    total_reasoning_tokens: int
+    total_thought_tokens: int
     """Number of tokens of thoughts for thinking models."""
 
     total_tokens: int