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Are AIs Still Struggling with CAPTCHAs?

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Summary

Anthropic's recent security-incident document includes a transcript in which its Claude model struggled with an image-based CAPTCHA. The model repeatedly reviewed the same images, could not decide which shape did not match, and eventually let the challenge expire. The author also cites unofficial reports that GPT-6 Astra solved all forty-eight levels of Neal Agarwal's "I'm Not a Robot" game.