Training AIs to Solve CAPTCHAs

Reported by Schneier on Security (Bruce Schneier)

Summary by Cyber Security News19 Oct 2026, 13:07 CET

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Interesting research: Abstract: Vision-language models (VLMs) can solve visual CAPTCHAs without task-specific training, but the agents built on them approach every challenge from scratch. For such an agent, the hundredth instance of a familiar puzzle costs as much time and compute as the first. Specialized detectors invert the trade-off, answering in milliseconds but only for categories they were trained on.

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