Sam Altman, chief executive officer of OpenAI, left, and Lisa Su, chair and chief executive officer of Advanced Micro Devices, arrive for a Senate Commerce, Science, and Transportation Committee hearing in Washington, DC, US, on Thursday, May 8, 2025.OpenAI and Advanced Micro Devices have reached a deal that could see Sam Altman's company take a 10% stake in the chipmaker. AMD stock skyrocketed more than 25% Monday during premarket trading following the news.OpenAI will deploy 6 gigawatts of AMD's Instinct ...