Checked fact 128213 Oct 2026Safety and security

The post says Anthropic built a two-stage classifier system with a false positive rate of less than 0.1%.

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The exact words it rests on

Specifically, we built a two-stage classifier system of the kind we described in our constitutional classifiers research. ... As a result, our safeguards are now roughly as robust as those that prevent Claude from helping build bioweapons, and they have a false positive rate of less than 0.1%.

What the source said when we opened it, on 13 Oct 2026.

The source

Strengthening our defenses against distillation attacks
Anthropic · 2026-10-12

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Checked

Checked by the notis newsroom on 13 Oct 2026, against the source above.

In the story

Anthropic says new safeguards cut distillers' extraction of reasoning tokens 13 Oct 2026

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In a sentence

“The post says Anthropic built a two-stage classifier system with a false positive rate of less than 0.1%.” ai notis, checked 13 Oct 2026. Source: Strengthening our defenses against distillation attacks (Anthropic). https://ainotis.com/c/1282

As a reference (APA style)

ai notis. (2026, October 13). The post says Anthropic built a two-stage classifier system with a false positive rate of less than 0.1% [Checked claim 1282]. ai notis. https://ainotis.com/c/1282

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