Alibaba Accused of Illicitly Accessing Claude AI Models Using 25,000 Fraudulent Accounts

Gbhackers •Divya • June 25, 2026

Anthropic has accused the Chinese technology conglomerate Alibaba of orchestrating a large-scale, coordinated operation to extract capabilities from its Claude AI models illegally. The company describes this incident as the largest adversarial distillation attack recorded to date. The allegations, outlined in a formal letter dated June 10, 2026, were addressed to U.S. Senate Banking Committee […]

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Anthropic Accuses Alibaba of Largest AI Distillation Attack to Date Anthropic has accused Alibaba of conducting the largest known distillation attack on its Claude AI model. In a letter to US Senators, Anthropic detailed that operators linked to Alibaba executed nearly 29 million exchanges using approximately 25,000 fraudulent accounts between April 22 and June 5, 2026. This attack aimed to illicitly extract Claude's capabilities, including software engineering and reasoning skills. Anthropic described the operation as industrial-scale, warning that such tactics could help Chinese models reach advanced capabilities more quickly. The company urged Congress to implement stricter regulations and penalties against such activities. Alibaba has denied any wrongdoing and is currently involved in legal actions against the US government regarding its designation as a security risk. The incident has raised significant concerns about the implications for US technology and national security. 12 sources 74

Alibaba Accused of Illicitly Accessing Claude AI Models Using 25,000 Fraudulent Accounts

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