Update app.py

app.py

@@ -104,7 +104,7 @@ def generate_response(input_data, chat_history, model_choice, max_new_tokens, sy
         messages.append(new_message)
     if model_choice == "Gemma 3 12B":
         model = model_12b
-        processor = processor_12b
+        processor = processor_4b
     else:
         model = model_4b
         processor = processor_4b