I found this quite impressive chatbot by the foaks over at instruct ai.
i like how its very personable. and the text to speach part makes it very bealivalbe. has good voice inflection capabilities.

Pi, your personal AI

Hi, I’m Pi. I’m your personal AI, designed to be supportive, smart, and there for you anytime. Ask me for advice, for answers, or let’s talk about whatever’s on your mind.

Author

by oran c