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Chinese AI labs tapped Claude to train rival models, Anthropic says

9/11/2026

The method at issue is model distillation: routing a competitor's API at volume, collecting the outputs, and feeding them into your own supervised training pipeline.

Each Claude response carries signal about reasoning structure and instruction-following behavior that would otherwise require substantial independent data collection and labeling to replicate.

Anthropic says China-based AI labs, including Alibaba and Moonshot AI, did exactly that, unauthorized, at a scale of millions of exchanges.

The mechanism behind the allegation Distillation from a frontier model works because API access is structurally open.

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