If you prefer to control models, for instance, I got used to using OpenAI models in my workflows, I would try Pickaxe. I am currently building an agent there, but it’s a complex system so turns into a challenge. However, it does look smart and multifunctional + it supports quite fresh OpenAI models. Until that project isn’t live, I stay with a simple widget option from Elfsight’s AI Chatbot where I didn’t have to control much myself, just trained the bot.
I also made an agent in GPT itself - they are surprisingly powerful, but didn’t move on to integrate it anywhere, so it just serves me as an ecommerce advisor for now.