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Microsoft, Nvidia, Meta and 22 Others Defended Open Weights. Anthropic and OpenAI Didn't Sign.

More than 20 companies said open models help competition and warned that broad limits could push AI development overseas.

  • On Friday, a coalition of more than 20 technology companies, including Nvidia, Meta, Microsoft, and Palantir, released a letter urging policymakers to avoid restricting open-weight AI models, warning that premature limits could stifle competition and push innovation overseas.
  • Tensions rose after Chinese startup Moonshot AI unveiled its Kimi K3 model earlier this month, which outperformed several U.S. competitors, prompting White House advisor Michael Kratsios to allege Wednesday that the model was built by distilling outputs from Anthropic's technology.
  • Signatories argue that "relying solely on closed models is not inherently safe: they can be breached, misused, or fail in ways that outsiders cannot detect," while suggesting concerns about unlawful distillation be handled through "targeted legal and commercial frameworks" rather than broad restrictions.
  • OpenAI and Anthropic notably did not sign the letter, though OpenAI president Greg Brockman stated on Thursday that "I think that, fundamentally, AI and AI usage is something that is actually very important to democratize."
  • Treasury Secretary Scott Bessent stated on Tuesday that the Trump administration would examine whether Chinese companies were stealing American intellectual property, reflecting broader concerns about the future of the United States AI ecosystem amid policy debates.
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The Decoder broke the news on Friday, July 24, 2026.
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