That’s great idea as well. What @hallowed-lizard-35251 mentioned is a popular method as well. Kind of gives an extra reassurance to the client. But yes charging per invocation can be a great strategy🙂 To the point and easy to explain. By default, Botpress uses GPT 3.5 for KB answers. If you upgrade to the new pricing plan, you can then also enable GPT 4 (but of course at higher cost)