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Are AIs Still Struggling with CAPTCHAs?

medschneierPublished 2026-09-18

<p>Anthropic&#8217;s recent security-incident <a href="https://www-cdn.anthropic.com/e50be2e51e7695dc4b1366a37a245a597377d3b5/Anthropic-Detecting-and-countering-091026.pdf">document</a> contains a bit about how CAPTCHAs are still <a href="https://gizmodo.com/ai-models-can-crack-everything-but-captchas-2000810126">frustrating</a> Claude.</p> <blockquote><p>In the transcript, the Claude model that i

Indicators of compromise

Original source: https://www.schneier.com/blog/archives/2026/09/are-ais-still-struggling-with-captchas.html