OpenAI could now be the world’s most valuable startup, ahead of Elon Musk’s SpaceX and TikTok parent company ByteDance, after a secondary stock sale designed to retain employees at the ChatGPT maker. Current and former OpenAI employees sold $6.6 billion in shares to a group of investors, pushing the privately held artificial intelligence company’s valuation to $500 billion, according to a source with knowledge of the deal who was not authorized to discuss it publicly. The valuation reflects high expectations for the future of AI technology and continues OpenAI’s remarkable trajectory from its start as a nonprofit research lab in 2015.
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