Truth Check/9 October 2026

“OSS Scanner gives enrolled open-source projects periodic free scans from Anthropic's most capable models, with model-generated reports sent without human review and an expected true-positive rate above 90%”

The claim as it travelled: Anthropic, 8 Oct 2026.

Anthropic's own page states the service, its free price, the absence of human review and the 90% expectation in those words; the rate is a forecast, not a measurement.

Checked Against

anthropic.com ↗Primary

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Anthropic opens free security scans for open-source projects - model-written reports, no human review, "a true-positive rate above 90%" expected - and a critical-infrastructure programme with eleven partners

The Anthropic Cyber Mission, launched 8 October: OSS Scanner for maintainers who opt in, and a Critical Infrastructure Defense Program for the firms that secure grids, water and transport. Every figure is Anthropic's own.

Every claim we have checked, in the Ledger.