OpenAI has hired Fidji Simo, former CEO of Instacart and head of the Facebook app, as the head of the company's apps business.This move allows OpenAI CEO Sam Altman to focus on research, compute, and safety, according to a post by Altman.Simo oversaw features like News Feed, Stories, and live video at Facebook, and led Instacart's efforts to go public after becoming its CEO in 2021.While serving as an OpenAI board member since last year, Simo will continue as Instacart CEO for a few months until a successor is announced.