Update app.py

app.py

@@ -21,7 +21,9 @@ st.set_page_config(page_title="Chat Toolkit",layout="wide")
 
 menu = ["htm", "txt", "xlsx", "csv", "md", "py"]  #619
 choice = st.sidebar.selectbox("Output File Type:", menu)
-model_choice = st.radio("Select Model:", ('gpt-3.5-turbo', 'gpt-3.5-turbo-0301', 'gpt-4'))
+model_choice = st.sidebar.radio("Select Model:", ('gpt-3.5-turbo', 'gpt-3.5-turbo-0301', 'gpt-4'))
+# default
+model_choice = 'gpt-3.5-turbo'
 
 def generate_filename(prompt, file_type):
     central = pytz.timezone('US/Central')