OpenAI reshuffles leadership as Fidji Simo takes medical leave  AxiosOpenAI chief operating officer takes on new role in shake-up  Financial TimesOpenAI's Fidji Simo takes medical leave, announces leadership changes  CNBCOpenAI COO Shifts Out of Role, AGI CEO Taking Medical Leave  BloombergOpenAI’s Fidji Simo Is Taking Medical Leave Amid an Executive Shake-Up  WIRED