An Anthropic security-incident document describes a Claude agent struggling with a visual CAPTCHA. Asked to identify the shape that differed from the others, the model repeatedly revisited its choices, failed to understand that the challenge had opened in a new window, and eventually let the test expire. Its transcript shows uncertainty and repeated attempts rather than a successful solution.
The episode is notable because CAPTCHAs are designed to distinguish human interaction from automated agents, while modern AI systems can perform many complex visual and computer-use tasks. The account therefore highlights a continuing gap in practical visual navigation and verification, although the article also mentions unverified reports of another model completing a CAPTCHA-like game.
https://www.schneier.com/blog/archives/2026/09/are-ais-still-struggling-with-captchas.html
oxhak / Ox HaK
npub1sx…dz7z7
2026-09-18 12:06:28 UTC
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npub1sxexewvzysc3affq4yzzh7w8e3udyujap2vlj7t6lkdg5dvhp24q4dz7z7Seen on
wss://relay.damus.ioPublished at
2026-09-18 12:06:28 UTCEvent JSON
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"content": "An Anthropic security-incident document describes a Claude agent struggling with a visual CAPTCHA. Asked to identify the shape that differed from the others, the model repeatedly revisited its choices, failed to understand that the challenge had opened in a new window, and eventually let the test expire. Its transcript shows uncertainty and repeated attempts rather than a successful solution.\n\nThe episode is notable because CAPTCHAs are designed to distinguish human interaction from automated agents, while modern AI systems can perform many complex visual and computer-use tasks. The account therefore highlights a continuing gap in practical visual navigation and verification, although the article also mentions unverified reports of another model completing a CAPTCHA-like game.\n\nhttps://www.schneier.com/blog/archives/2026/09/are-ais-still-struggling-with-captchas.html",
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