@@ -89,8 +89,8 @@ def _get_token_usage(result: "Messages") -> "tuple[int, int, int, int]":
             output_tokens = usage.output_tokens
         if hasattr(usage, "cache_read_input_tokens") and isinstance(usage.cache_read_input_tokens, int):
             cache_read_input_tokens = usage.cache_read_input_tokens
-        if hasattr(usage, "cache_creation_input_tokens") and isinstance(usage.cache_creation_input_tokens, int):
-            cache_write_input_tokens = usage.cache_creation_input_tokens
+        if hasattr(usage, "cache_write_input_tokens") and isinstance(usage.cache_write_input_tokens, int):
+            cache_write_input_tokens = usage.cache_write_input_tokens
 
     return input_tokens, output_tokens, cache_read_input_tokens, cache_write_input_tokens
 
@@ -115,8 +115,8 @@ def _collect_ai_data(
                 output_tokens += usage.output_tokens
                 if hasattr(usage, "cache_read_input_tokens") and isinstance(usage.cache_read_input_tokens, int):
                     cache_read_input_tokens += usage.cache_read_input_tokens
-                if hasattr(usage, "cache_creation_input_tokens") and isinstance(usage.cache_creation_input_tokens, int):
-                    cache_write_input_tokens += usage.cache_creation_input_tokens
+                if hasattr(usage, "cache_write_input_tokens") and isinstance(usage.cache_write_input_tokens, int):
+                    cache_write_input_tokens += usage.cache_write_input_tokens
                 model = event.message.model or model
             elif event.type == "content_block_start":
                 pass
 
@@ -634,7 +634,7 @@ def _extract_tokens(
 
     cache_write_tokens = (
         _get_value(token_usage, "cache_write_tokens") or  # Pydantic-AI
-        _get_value(token_usage, "cache_creation_input_tokens")  # Anthropic
+        _get_value(token_usage, "cache_write_input_tokens")  # Anthropic
     )
 
     return input_tokens, output_tokens, total_tokens, cached_tokens, cache_write_tokens
Original file line number	Diff line number	Diff line change
`@@ -634,7 +634,7 @@ def _extract_tokens(`
`634`	`634`
`635`	`635`	`cache_write_tokens = (`
`636`	`636`	`_get_value(token_usage, "cache_write_tokens") or # Pydantic-AI`
`637`		`- _get_value(token_usage, "cache_creation_input_tokens") # Anthropic`
	`637`	`+ _get_value(token_usage, "cache_write_input_tokens") # Anthropic`
`638`	`638`	`)`
`639`	`639`
`640`	`640`	`return input_tokens, output_tokens, total_tokens, cached_tokens, cache_write_tokens`