It would be extremely poor form for founders to intentionally leave their startup at this stage to take another job. In all likelihood they were pushed out by the board.
My guess is that the founders were all in on Pi, their conversational language model, and investors lost confidence in their ability to build a sustainable venture-scale company on the ~4th best AI chatbot.
My guess is that the founders were all in on Pi, their conversational language model, and investors lost confidence in their ability to build a sustainable venture-scale company on the ~4th best AI chatbot.