OpenAI asks investors not to back rival start-ups such as Elon Musk’s xAI Financial TimesOpenAI Completes Deal That Values Company at $157 Billion The New York TimesOpenAI Nearly Doubles Valuation to $157 Billion in Funding Round The Wall Street JournalOpenAI closes funding at $157 billion valuation, as Microsoft, Nvidia, SoftBank join round CNBCOpenAI just closed a megaround. Here’s how its funding stacks up to other Bay Area AI startups The Business Journals