Seeking Advice for My E-commerce AI Chatbot on Shopify: Which Model to Choose?

I’m developing an e-commerce chatbot for Shopify and need your expertise. I’m torn between various models like LLMs, ChatGPT, and Bard AI. If you have experience or insights into which one would work best for an e-commerce chatbot, please share your thoughts. Your input will be a huge help in this journey. Thanks, folks!