Analysis
Nvidia, Microsoft, Meta, Palantir and more than 20 other technology companies published a joint letter urging the Trump administration to resist calls for sweeping new limits on open-weight AI models, arguing that restricting open-weight development could weaken America's position in the global AI race just as Chinese competitors are closing the capability gap.
The signatory list is as telling as its content. All 25-plus companies profit in some way from open-weight model distribution, infrastructure, or the broader ecosystem around openly available AI -- chipmakers, cloud providers, and enterprise software firms whose businesses benefit from a wide field of models running on their infrastructure. OpenAI and Anthropic, the two labs most associated with closed, proprietary frontier models, are conspicuously absent from the list.
“OpenAI and Anthropic, the two labs most associated with closed, proprietary frontier models, are conspicuously absent from the list.”
The timing makes the letter more than an abstract policy position. It landed the same week the White House's OSTP director publicly accused Moonshot AI of covertly distilling Anthropic's Fable model to build its viral open-weight Kimi K3 -- an accusation Moonshot disputes and that AI researchers say lacks public supporting evidence. If the administration were to act on that accusation with new export controls or open-weight restrictions targeting Chinese labs, it would be precisely the kind of policy this letter is trying to head off before it's written.
The underlying tension is genuinely two-sided: open-weight models genuinely have let Chinese labs like Moonshot and DeepSeek close a capability gap that once looked insurmountable, which is exactly the argument both for restricting them (deny adversaries the technology) and against restricting them (US firms and developers lose access to models that compete on merit). The 25 signatories are betting that American open-weight ecosystems -- built on Nvidia chips, Microsoft's Azure, and Meta's Llama lineage -- benefit more from an open field than from restrictions that would also constrain US-based open-weight development.
What to watch: whether the administration's response to the Moonshot distillation accusation takes the form of a broad open-weight policy or a narrower, company-specific enforcement action, and whether OpenAI or Anthropic ultimately break their silence to either join or publicly oppose this coalition's position.
