Are AIs Still Struggling with CAPTCHAs?
infonewsLLM-Specific
securityresearch
Source: Schneier on SecuritySeptember 18, 2026
Summary
Anthropic's Claude model struggles with CAPTCHAs (automated tests that verify you're human by asking you to identify images or solve puzzles), often getting confused, second-guessing itself, and failing to complete simple image identification challenges before they expire. The article contrasts this with unconfirmed reports that other AI models like GPT-6 Astra can solve CAPTCHA-like games more successfully, making it unclear how consistently different AIs handle these security tests.
Classification
Attack SophisticationModerate
Impact (CIA+S)
integrity
AI Component TargetedInference
Affected Vendors
AnthropicOpenAI
Related Issues
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Original source: https://www.schneier.com/blog/archives/2026/09/are-ais-still-struggling-with-captchas.html
First tracked: September 18, 2026 at 08:01 AM
Classified by LLM (prompt v3) · confidence: 72%