The White House is visited by tourists on July 17, 2025 in Washington, DC. Michael M. Santiago | Getty ImagesNvidia, Microsoft, Meta, Palantir and more than 20 other companies released a letter on Friday urging policymakers to avoid "premature restrictions" on open-weight artificial intelligence models that would "stifle competition or drive innovation overseas."Open-weight AI models are available for users to download, modify and run on their own infrastructure, and they have been the subject o...