Update user message about model response time.

app.py

@@ -258,7 +258,7 @@ def create_app():
                 choices=list(AVAILABLE_MODELS.keys()),
                 value=DEFAULT_MODEL,
                 label="🤖 Select Model",
-                info="Choose an AI model for code generation",
+                info="💡 Larger models (DeepSeek, Kimi, MiniMax) take longer than smaller models (Llama, Mistral, GLM) which are faster.",
                 scale=2,
             )