A group of leading technology companies, including Nvidia, Microsoft, Meta, IBM and Andreessen Horowitz, has urged the US administration to support the development of open-weight artificial intelligence (AI) models. In a joint letter signed by 25 firms, the coalition argued that open-weight AI is key to maintaining America’s technological leadership and warned against premature restrictions that could limit innovation. The appeal comes as Washington mulls tighter controls on advanced AI technologies amid growing concerns over the rapid progress of Chinese AI companies. Nvidia CEO Jensen Huang, a vocal proponent of open-weight AI, shared a post along with the signed letter. “I’m sharing a letter Nvidia signed on why open models matter. AI will transform every industry, power every company, and be built by every country,” he wrote. Huang said open models strengthen safety and cybersecurity, accelerate innovation and diffusion, and enable sovereignty. “The world needs both frontier closed models and frontier open models,” he added. The letter comes amid a brewing debate in Silicon Valley over the rapid spread of Chinese AI tools, especially open-weight …