Update app.py

app.py

@@ -48,9 +48,19 @@ class AdvancedAgent:
         
     def build_graph(self):
         """Build the LangGraph agent with necessary tools"""
+
+        llm = ChatOpenAI(
+        model="google/gemini-2.5-pro-exp-03-25",
+        temperature=0,
+        openai_api_key=os.getenv("OPENROUTER_API_KEY"),
+        openai_api_base="https://openrouter.ai/api/v1"
+        )
+        print("LLM initialized: Gemini 2.5 Pro via OpenRouter")
+
+        
         # Initialize LLM
-        llm = ChatGoogleGenerativeAI(model="gemini-2.0-flash", temperature=0)
-        print("LLM initialized: Gemini 2.0 Flash")
+        # llm = ChatGoogleGenerativeAI(model="gemini-2.0-flash", temperature=0)
+        # print("LLM initialized: Gemini 2.0 Flash")
         
         # Initialize tools
         wikipedia_tool = WikipediaQueryRun(api_wrapper=WikipediaAPIWrapper())