diff --git a/packages/openai-adapters/src/apis/Anthropic.ts b/packages/openai-adapters/src/apis/Anthropic.ts
index b2663896f72..abfe53446b9 100644
--- a/packages/openai-adapters/src/apis/Anthropic.ts
+++ b/packages/openai-adapters/src/apis/Anthropic.ts
@@ -322,7 +322,9 @@ export class AnthropicApi implements BaseLlmApi {
         prompt_tokens: usage?.input_tokens ?? 0,
         prompt_tokens_details: {
           cached_tokens: usage?.cache_read_input_tokens ?? 0,
-        },
+          cache_read_tokens: usage?.cache_read_input_tokens ?? 0,
+          cache_write_tokens: usage?.cache_creation_input_tokens ?? 0,
+        } as any,
       },
       choices: [
         {