🧰 Preserved thinking

The items that name it 3

• Anthropic says AI distillation attack defenses cut Claude extraction by 90% to 99%
  article2026-10-13

  Prevents API accounts created on or after August 31, 2026 from editing Claude's previous context; introduced with Claude Fable 5.1 and Claude Opus 5.5.

• Strengthening our defenses against distillation attacks
  article2026-10-13

  Measure that prevents new API accounts (created on or after August 31, 2026) from editing Claude's prior context, making repeated extraction of protected reasoning via proxy networks harder

• Strengthening our defenses against distillation attacks
  article2026-10-12

  Anthropic API measure that prevents new API accounts (created on or after August 31, 2026) from editing Claude's prior context, making it harder to use proxy networks to repeatedly extract protected reasoning.

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