China’s open-weight AI models are prompting US players to reconsider their strategy.

China’s open-weight AI models are prompting US players to reconsider their strategy. Welcome to Bloomberg’s AI Today newsletter. Every weekday we’ll break down artificial intelligence’s threats and opportunities for businesses, workers, finance and economies. Sign up now if you’re not already on the list. An earnest, urgent-sounding letter made its way to Washington dated July 24, signed by an impressive roster of companies, their logos running one-and-a-half pages long. Over two dozen firms led by the likes of Nvidia and Microsoft, as well as Meta, Hugging Face, and Andreessen Horowitz, warned regulators against “premature” restrictions on open weight AI models, the variety that can be downloaded, modified and redistributed with relatively few constraints. Conspicuously absent among the signatories — no surprise — were Anthropic and OpenAI, the two labs with the most to lose from ceding their ground on tightly-controlled proprietary models.