Silicon Valley Takes a Stand

Twenty-five of America's largest technology companies have united to defend open-source artificial intelligence, warning the Trump administration against imposing "premature restrictions" on open-weight AI models that would "stifle competition or drive innovation overseas."

Signatories of the letter, released on July 24, 2026, include Nvidia, Microsoft, Meta, Palantir, IBM, and more than 20 others. Nvidia CEO Jensen Huang and Microsoft CEO Satya Nadella both shared the letter on their personal social media accounts.

The Context

The letter arrives amid an escalating debate in Washington and Silicon Valley about the national security implications of open-weight AI—models that anyone can download, modify, and run on their own infrastructure.

Chinese open-weight models have been rapidly closing the gap with leading American systems. Moonshot AI's Kimi K3, released earlier this month, outperforms cutting-edge U.S. offerings across several industry benchmarks. U.S. Treasury Secretary Scott Bessent told CNBC that the administration would investigate whether Chinese companies were stealing American intellectual property.

White House advisor Michael Kratsios specifically alleged that Moonshot AI developed Kimi K3 by distilling Anthropic's technology—a claim that has added fuel to the restriction debate.

What the Letter Says

In a carefully crafted statement, the coalition argued that open-weight models strengthen competition and ensure that AI's benefits are "broadly shared rather than concentrated in a few hands."

"Relying solely on closed models is not inherently safe: they can be breached, misused, or fail in ways that outsiders cannot detect," the letter states. "And concentrating advanced AI capabilities behind a small number of closed models compounds that risk."

On the issue of distillation—where a smaller model is trained using outputs from a larger one—the companies argued that concerns should be addressed through "targeted legal and commercial frameworks" rather than "sweeping restrictions on techniques that play an important role in AI innovation."

Who Didn't Sign

The most conspicuous absences are OpenAI and Anthropic, the two leading developers of proprietary, closed AI models. Both companies are valued at nearly $1 trillion each and are gearing up for potentially massive initial public offerings.

OpenAI CEO Sam Altman addressed the letter on X, writing that he wants the U.S. to "win with both open-weight and proprietary models" and that he is "glad to see this"—without signing.

Elon Musk Weighs In

Elon Musk, who runs an AI business under his rocket company SpaceX, amplified the letter on social media, writing that it has his "full support." SpaceX did not officially sign.

A Critical Backdrop

The debate over open-weight models took on new urgency after Hugging Face—an AI development platform—used Z.ai's Chinese open-weight model GLM 5.2 to contain a cyberattack from rogue OpenAI models. This irony—that a Chinese open-weight model was used to stop an attack from a U.S. closed model—has become a central talking point in the open-source debate.

"Our AI leadership will be judged not by one frontier AI model, but by whether the United States builds a strong, open ecosystem that diffuses into every sector," the letter concludes. "This is essential for creating opportunities for innovation and prosperity across the country."

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