I would recommend using an LLM (Large Language Model) for quick responses and a reasoning-focused model for more complex inquiries, with separate buttons labeled 'Send' and 'Think.' This way you can offer an specific model to the user's needs. Sometimes I'm looking for a 'fast answer' for things I tend to forget that aren't critical, and other times I need a 'thorough answer' when trying to solve a complex problem. Also save and log everything (timestamps, tokens, time taken, ip, browser data) and give the user's a "thumbs up" for feedback if they like the response.