Sources: investors recently approached OpenAI with a proposal to invest at a $1.2T valuation, but OpenAI believes its value should be at least $1.5T (Sri Muppidi/New York Times)

Sri Muppidi / New York Times: Sources: investors recently approached OpenAI with a proposal to invest at a $1.2T valuation, but OpenAI believes its value should be at least $1.5T — The funding round would double the value of the start-up behind ChatGPT and establish it as the world's most valuable private company.