After stepping down as Amazon’s CEO four years ago, Jeff Bezos, the billionaire founder and former chief executive of the online shopping company, is going to be a CEO again. This time, Bezos has appointed himself co-CEO of an AI startup called Project Prometheus, the New York Times reported, citing anonymous sources.

The startup, which will focus on developing AI for engineering and manufacturing in various fields, has already received $6.2bn in funding – more than many companies are able to raise in their lifetimes. Leading the company alongside Bezos is his co-founder and co-CEO Vik Bajaj, a celebrity tech executive in his own right. Bajaj is a physicist and chemist best known for his work at Google’s moonshot factory, X, where he founded the health startup Verily.