Chinese military researchers used artificial intelligence models developed by leading U.S. technology companies to boost defence capabilities despite Washington's efforts to restrict China's access to advanced American technology, according to a newly published Reuters investigation.

The findings highlight the growing challenge facing the United States as it tries to prevent cutting-edge AI from strengthening China's military capabilities.

The United States has tried to stop AI tech sales to China.

For example, the Trump administration temporarily paused sales of Nvidia’s custom H20 AI chips to China in early 2025.

When sales resumed under new rules, experts warned that blocking computer hardware alone cannot stop AI software and models from crossing borders and according to the study that warning has proved to be true.