# All xAI co-founders depart, leaving Musk sole founder - Date: 2026-04-07 - Category: Artificial Intelligence Every person Elon Musk recruited to co-found xAI has now left — at the moment he is preparing to sell a $1.25 trillion combined entity to public markets via a SpaceX IPO. His answer: hire two engineers from a $2.9B startup and personally review candidates he once rejected. ---