OpenAI CEO Sam Altman, Microsoft’s Brad Smith, and other tech leaders testified before the U.S. Senate in a wide-ranging 2025 hearing on AI regulation, infrastructure, and competition with China.

OpenAI CEO Sam Altman and executives from Microsoft and chipmaker Advanced Micro Devices testified on Capitol Hill about the biggest opportunities, risks and needs facing an industry which lawmakers and technologists agree could fundamentally transform global business,

In a letter to OpenAI’s employees posted on the company’s website, Altman wrote that OpenAI is being restructured into three major “pillars”: Research, Compute, and Applic