Alibaba shares came under pressure after Anthropic accused operators tied to Alibaba's Qwen AI lab of a large-scale effort to extract capabilities from Claude. The accusation adds a new market risk to an already tense U.S.-China AI race.
The allegations are serious but still allegations. Alibaba had not publicly answered in the reports reviewed for this story, so the market is trading the uncertainty rather than a resolved finding.
What happened
WSJ reported Anthropic accused Alibaba of a 'brazen' campaign involving nearly 25,000 fake accounts and around 29 million Claude interactions. Business Insider reported the letter was dated June 10 and sent to Senators Tim Scott and Elizabeth Warren.
Investors.com reported Alibaba's U.S.-listed shares fell more than 3% in early trading Thursday and touched a 52-week low of $96.28.
Why Alibaba Anthropic matters
The case speaks directly to AI intellectual property, model security and U.S.-China technology competition. If regulators take the accusations seriously, it could increase scrutiny on Chinese AI labs and cloud providers.
For Alibaba investors, the risk is that cloud and AI ambitions become harder to value if the company faces more political, legal or customer-trust pressure.
Market impact
The Alibaba move added to weakness in Hong Kong tech shares during the broader AI selloff. Business Insider said Alibaba fell another 6% in Hong Kong as Asian markets slid.
The story also touches U.S. AI names because it may strengthen arguments for tighter controls around model access, export rules and anti-distillation defenses.
Key numbers
- WSJ and Business Insider reported roughly 25,000 fraudulent accounts were alleged.
- Reports cited about 28.8 million to 29 million Claude interactions between April and June 2026.