For good measure, OpenAI is also deeply entangled with Microsoft, the world’s second-richest firm. The deal would make OpenAI more dependent on Nvidia’s chips, reducing the incentive to build its own. Some Nvidia bulls celebrated the proposed investment as an expedient way for the chipmaker to fund sales. In an interview with CNBC, Stacy Rasgon of Bernstein, an investment firm, acknowledged that it would exacerbate worries about the “circular dynamics” of Nvidia investing in companies that it supplies with GPUs. Sam Altman, OpenAI’s boss, acknowledged three difficulties in particular to overcome as he announced the Nvidia partnership.