Update app/api/chat/route.ts

app/api/chat/route.ts

@@ -28,7 +28,12 @@ export async function POST(req: Request) {
   const response = await openai.chat.completions.create({
     model: 'mistral-large-latest',
     stream: true,
-    messages,
+    messages: messages
+      .map(message => ({
+        // map "assistant" to "agent" for Mistral:
+        role: message.role === 'assistant' ? 'agent' : 'user',
+        content: message.content,
+    })),
     functions,
     function_call
   })