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Alibaba's campaign alone involved more than 151 million exchanges with Claude between May and July, Anthropic said
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Anthropic accused five China-based AI companies of conducting unauthorized large-scale campaigns to extract Claude's capabilities and use them to train competing models, with the combined activity totaling nearly 200 million exchanges linked to distillation attacks.
The company's threat intelligence report, released Thursday, named Alibaba, Moonshot AI, DeepSeek, Xiaomi, and Zhipu as the parties behind what it terms "illicit distillation" — a technique whereby one lab feeds another model's outputs into its own training pipeline without permission. The report said the campaigns targeted Claude's most valuable capabilities, including agentic reasoning, software engineering, and logical reasoning.
