Update app.py

app.py

@@ -30,7 +30,8 @@ llm = None
 
 # Model Selection
 #st.header("Model Selection")
-model_choice = st.selectbox("Select LLM", ["OpenAI Model","Groq-based LLM"])
+model_choice = st.radio("Select LLM", ["OpenAI Model", "Groq-based LLM"], index=0)
+
 
 # API Key Validation and LLM Initialization
 groq_api_key = os.getenv("GROQ_API_KEY")