Update app.py

app.py

@@ -174,7 +174,7 @@ def create_agent_graph(owl_file_path: str) -> StateGraph:
 
         try:
             llm = ChatGroq(
-                model_name="llama-3.3-70b-versatile",
+                model_name="openai/gpt-oss-120b",
                 api_key=GROQ_API_KEY,
                 temperature=0.7
             )