Artificial intelligence pioneer Fei-Fei Li has had discussions with investors to raise hundreds of millions in funding for her startup, World Labs, at a valuation of about $5 billion, according to people familiar with the discussion.The new valuation would be a leap forward for World Labs, which came out of stealth in 2024 with a $230 million financing valuing the company at $1 billion. Existing investors include Andreessen Horowitz, NEA and Radical Ventures, a firm where Li is listed as a scien...