A version of this story appeared in CNN Business’ Nightcap newsletter. To get it in your inbox, sign up for free here. New York — Sam Altman, the artificial intelligence hype master, is in damage-control mode. OpenAI’s latest version of its vaunted ChatGPT bot was supposed to be “PhD-level” smart. It was supposed to be the next great leap forward for a company that investors have poured billions of dollars into. Instead, ChatGPT got a flatter, more terse personality that can’t reliably answer ba...