Update app.py

app.py

@@ -73,7 +73,7 @@ def chatbot_interface():
     
     # 모델 고정 설정
     if "ai_model" not in st.session_state:
-        st.session_state["ai_model"] = "claude-3-5-sonnet-20241022"
+        st.session_state["ai_model"] = "claude-3-7-sonnet-20250219"
     # 세션 상태 초기화
     if "messages" not in st.session_state:
         st.session_state.messages = []