STORY: AI giant Anthropic has confidentially filed for a U.S. initial public offering, the company said on Monday, edging ahead of rival OpenAI in a closely watched race to reach public markets.”I think it’s an easy narrative to say it matters who gets to the IPO door first, Anthropic or OpenAI,” said Long.He added that success will be measured more by which company “runs a better business [and] is more plugged into the fundamental needs” of its clients over the longterm.