Anthropic says AI distillation attack defenses cut Claude extraction by 90% to 99%

Stronger defenses against AI distillation attacks have cut the data harvested from Claude by about 90% to 99% , early evidence suggests. The measures target covert attempts to copy the model’s capabilities—and have cost its developer revenue and trillions of tokens’ worth of paying traffic. Key takeaways Claude’s reasoning-token extraction fell tenfold to a hundredfold after classifier deployment. The detection system reports fewer than 0.1% false positives. Repeated extraction attempts trigger tighter limits and account bans. The company urges cloud platforms and model developers to disrupt abuse together.

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