Update app.py

app.py

@@ -101,7 +101,7 @@ def main() -> None:
             st.warning("Please provide your OpenAI API key to enable chat functionality.")
 
         # Dropdown for model selection.
-        model_options = ["gpt-4o", "gpt-4o-mini"]
+        model_options = ["gpt-4.1", "gpt-4o", "gpt-4o-mini"]
         default_model = config.ai_model if config.ai_model in model_options else model_options[0]
         selected_model = st.selectbox(
             "Model",