OpenAI Chief Executive Sam Altman has hosted hundreds of Fortune 500 company executives in San Francisco, New York and London this month where he and other OpenAI executives pitched AI services for corporate use, going head-to-head in some cases with financial backer Microsoft, attendees told Reuters.OpenAI Chief Executive Sam Altman has hosted hundreds of Fortune 500 company executives in San Francisco, New York and London this month where he and other OpenAI executives pitched AI services for corporate use, going head-to-head in some cases with financial backer Microsoft, attendees told Reuters.