Greg Brockman, president of OpenAI, arrives at a federal courthouse as the trial in Elon Musk's lawsuit over OpenAI's for-profit conversion continues, in Oakland, California, May 6, 2026.Manuel Orbegozo | ReutersThere's a new second-in-command at OpenAI. Greg Brockman, the company's president, is officially responsible for OpenAI's most important and profitable projects after Fidji Simo stepped down from her role on Thursday due to chronic illness.Simo, a former Meta executive and ex-CEO of Inst...