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.

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.