diff --git a/packages/core/src/callbacks/CallbackManager.ts b/packages/core/src/callbacks/CallbackManager.ts
index ff7f924ba0f74f93919723bf856ec6cf74248fb6..fb7eff8c9e765439f43e0b34fac324ddbb620324 100644
--- a/packages/core/src/callbacks/CallbackManager.ts
+++ b/packages/core/src/callbacks/CallbackManager.ts
@@ -39,7 +39,14 @@ export interface DefaultStreamToken {
 //OpenAI stream token schema is the default.
 //Note: Anthropic and Replicate also use similar token schemas.
 export type OpenAIStreamToken = DefaultStreamToken;
-export type AnthropicStreamToken = DefaultStreamToken;
+export type AnthropicStreamToken = 
+{
+  completion: string,
+  stop_reason: string | undefined,
+  model: string,
+  stop: boolean | undefined,
+  log_id: string
+};
 
 //
 //Callback Responses