中国の安価な高性能AIモデルを巡るシリコンバレーの分断

The surge of powerful Chinese open-weight AI models has sparked a feud in Silicon Valley and Washington over whether they are threats to U.S. national security or essential parts of the expanding AI economy.

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Entrepreneurs and politicians are taking sides — arguing for either unfettered access or a strict crackdown — by forming alliances, issuing open letters, and launching social media volleys.

Here’s what you need to know.

What’s driving the Chinese open model debate?

While the leading American AI companies have kept their best models closed-source, Chinese AI labs have been releasing open-weight models as a way to attract global customers. These open models are becoming increasingly powerful.

Moonshot’s open-weight model, Kimi K3, now ranks fourth on Artificial Analysis’ intelligence index, behind only Anthropic’s Opus 5 and Fable 5 and OpenAI’s GPT-5.6 Sol.

While the adoption of Chinese models is on the rise in the U.S., politicians and companies have also sounded alarms. Some accuse Chinese companies of building powerful models with smuggled chips and distillation — using the output of American models to train their own. Others warn of the security risks posed by the powerful, free-to-download models.

Whether to embrace or reject these Chinese models has become a divisive issue in the U.S. tech industry.

What makes Chinese open models so competitive?

Chinese open models are cost-effective. Open-weight models are free to download, but running them incurs computing costs. Many users pay to access the models through their developers or third-party cloud providers.

Facing ballooning AI costs, some U.S. companies and developers have been diverting simpler tasks to Chinese models to save money.

Companies can also use Chinese open-weight models to build customized AI systems, or host the models locally so they don’t have to share data with external parties.

Chinese open models benefit AI infrastructure providers and companies that need affordable AI services.

Nvidia has been a leading voice in support of open-weight models. The availability of open models creates a bigger customer base for its AI chips. On July 24, Nvidia chief executive Jensen Huang posted on X for the first time to share an open letter stressing the importance of open models in expanding access to the AI economy. Other tech giants, including Microsoft, Google, and Meta, have since joined the letter.

OpenAI, which has released open-weight models that are smaller than China’s models, also signed on. “i want the US to win in AI both in open source and proprietary models,” chief executive Sam Altman wrote in reply to Huang’s post on X.

A group of 179 Silicon Valley startups alsosent a letter to the Trump administration, calling on officials to preserve their access to open models.

On the other side, Anthropic has called for more restrictions on Chinese AI to protect America’s lead. In a statement, Dario Amodei argued that China could use its models to achieve military superiority or to repress its people. He added that open-weight models could also be misused to carry out cyber or biological attacks, because guardrails are hard to apply to them.

Flo Crivello, the founder of AI assistant startup Lindy, wrote on X that although his company used DeepSeek, he supported a ban on Chinese models to make sure America leads the global AI race and to prevent the “artificially cheap models” from hurting the U.S. AI ecosystem.

What are U.S. government officials saying?

Tech policymakers in the Trump administration have expressed different views on whether the government should crack down on Chinese AI.

Among the hardliners, Michael Kratsios, a top technology adviser to President Donald Trump, accused Moonshot of distilling Anthropic’s model Fable 5 and acquiring banned Nvidia chips. Treasury Secretary Scott Bessent has warned the U.S. could sanction Chinese companies for conducting “distillation attacks.”

On the other side, David Sacks, another adviser to Trump, has argued that restricting Chinese open models would undermine the competitiveness of the U.S. companies that use them. Commerce Secretary Howard Lutnick is also concerned about companies’ access to cheaper AI, according to a Politico report.

What about security risks?

U.S. officials have raised concerns about Chinese censorship and potential “backdoors” — hidden mechanisms that could trigger malicious behavior when a model encounters a specific input. Chinese models commonly censor content Beijing deems sensitive, though no security backdoors have been publicly documented in major Chinese models.

Ryan Fedasiuk, a fellow at the think tank American Enterprise Institute, said it is possible to address these security issues without banning the models. Potential solutions include post-training the models to remove censorship behaviors and labeling AI products built with Chinese models, Fedasiuk told *Rest of World*.

Both open and closed models can lead to cyberattacks. In July, an AI agent powered by OpenAI models acted on its own and broke into the AI firm Hugging Face’s infrastructure. Hugging Face turned to Chinese open model GLM-5.2 to analyze the attack, because the attack commands had been blocked by frontier AI models’ safety guardrails.

Hussein Abbass, an AI and computing professor at the University of New South Wales, Canberra, said that instead of a blanket ban on open models, the global community should develop systems to evaluate their safety risks and regulate model releases. “What comes to my mind is movie classification,” Abbass told *Rest of World*. “Every time a movie gets released, every country has its own classification for appropriate use.”

Proponents of open-source say open models can help fend off attacks.

On July 27, Nvidia announced a coalition of tech companies called the Open Secure AI Alliance, which promises to share open cybersecurity defense tools. The announcement called on regulators to see open models “as defensive assets, not liabilities.”

How is Beijing playing the narrative?

The Chinese government has positioned the country as a champion of an open, inclusive global AI order. Speaking at an AI conference last week, Chinese President Xi Jinping said China’s AI industry would provide a public good for the world, and implicitly criticized the U.S. for placing its own national security above that of others.

On July 27, China’s Ministry of Commerce also accused the U.S. of “AI hegemonism” over its distillation allegations, saying American companies had also distilled Chinese models. The ministry threatened countermeasures if Chinese interests were

harmed.