Merge pull request #1055 from unsync/feature/openrouter-usage

feat: support openrouter usage in api

Author: VisargD

src/providers/openrouter/chatComplete.ts

@@ -69,6 +69,9 @@ export const OpenrouterChatCompleteConfig: ProviderConfig = {
   models: {
     param: 'models',
   },
+  usage: {
+    param: 'usage',
+  },
   stream: {
     param: 'stream',
     default: false,
@@ -78,16 +81,29 @@ export const OpenrouterChatCompleteConfig: ProviderConfig = {
   },
 };
 
+interface OpenrouterUsageDetails {
+  prompt_tokens: number;
+  completion_tokens: number;
+  total_tokens: number;
+  prompt_tokens_details?: {
+    cached_tokens: number;
+    audio_tokens: number;
+  };
+  completion_tokens_details?: {
+    reasoning_tokens: number;
+    audio_tokens: number;
+    accepted_prediction_tokens: number;
+    rejected_prediction_tokens: number;
+  };
+  cost?: number;
+}
+
 interface OpenrouterChatCompleteResponse extends ChatCompletionResponse {
   id: string;
   object: string;
   created: number;
   model: string;
-  usage: {
-    prompt_tokens: number;
-    completion_tokens: number;
-    total_tokens: number;
-  };
+  usage: OpenrouterUsageDetails;
 }
 
 export interface OpenrouterErrorResponse {
@@ -103,11 +119,7 @@ interface OpenrouterStreamChunk {
   object: string;
   created: number;
   model: string;
-  usage?: {
-    prompt_tokens: number;
-    completion_tokens: number;
-    total_tokens: number;
-  };
+  usage?: OpenrouterUsageDetails;
   choices: {
     delta: {
       role?: string | null;
@@ -149,11 +161,7 @@ export const OpenrouterChatCompleteResponseTransform: (
         },
         finish_reason: c.finish_reason,
       })),
-      usage: {
-        prompt_tokens: response.usage?.prompt_tokens,
-        completion_tokens: response.usage?.completion_tokens,
-        total_tokens: response.usage?.total_tokens,
-      },
+      usage: response.usage,
     };
   }