Update app.py

app.py

@@ -375,6 +375,7 @@ def process_query(question, display_logs=False, model_choice="gpt-4.1"):
                 "total_tokens": cb.total_tokens,
                 "prompt_tokens": cb.prompt_tokens,
                 "completion_tokens": cb.completion_tokens,
+
                 "total_cost": cb.total_cost
             }
             logs.append(f"Token usage: {token_usage}")