Update app.py

app.py

@@ -21,7 +21,7 @@ You are an intelligent agent designed to answer questions using the tools at you
 You will receive a question from the user, and you can choose to either answer it directly or use the provided tools to gather more information before answering.
 Always try to provide the most accurate and complete answer possible. If you use a tool, make sure to incorporate the information you get from it into your final answer.
 Plan your approach before answering and don't hesitate to use the tools if they can help you provide a better answer.
-Your final must include only the answer to the user's question, without any additional commentary or explanation.
+Your final answer must include only the answer to the user's question, without any additional commentary or explanation.
 """
 
 # --- Basic Agent Definition ---
@@ -34,7 +34,7 @@ class AgentState(TypedDict):
 class BasicAgent:
     def __init__(self):
         self.llm = ChatOpenAI(
-            model="openai/gpt-oss-120b:free",
+            model="stepfun/step-3.5-flash:free",
             base_url="https://openrouter.ai/api/v1",
             api_key=os.environ.get("OPENROUTER_API_KEY")
         )
@@ -54,9 +54,6 @@ class BasicAgent:
         )
         builder.add_edge("tools", "assistant")
         self.agent = builder.compile()
-
-
-
         print("BasicAgent initialized.")
     def assistant(self, state: AgentState) -> dict:
         return {