OpenAI bought an undisclosed set of patents from the Altman-backed chip startup Rain AI. AI company, OpenAI, has announced the purchase of patents from chip startup, Rain AI. It’s worth noting that Rain AI has received funding from Sam Altman, the CEO of OpenAI, in the past. In 2019, OpenAI signed an LOI to purchase chips to the tune of $51 million once Rain released its chips. Later on, Rain AI ran out of funds, lost its customer base, and began to search for a buyer circa 2025.