Anthropic says tens of thousands of accounts banned after anti-distillation defenses
Anthropic says its new defenses cut the Claude reasoning data distillers can harvest by 90–99%, with tens of thousands of accounts banned, often within two hours.



90 to 99 percent less Claude reasoning data. That is what Anthropic says distillers can harvest now after its new defenses. Tens of thousands of accounts got banned often within two hours. Anthropic also says it turned away trillions of tokens of paying traffic from people trying to extract Claude thinking. Model copying just got a lot more expensive. The race is not only about training. It is about locking the printer.
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