CAPTCHAs can still detect AI agents

# Summary While AI systems can now solve CAPTCHAs with human-level accuracy, researchers found statistically significant differences in *how* they solve them compared to humans—including distinct patterns in sequential clicks, direction changes, and error rates. The researchers developed CogCAPTCHA30, a 30-task battery combining CAPTCHAs with cognitive psychology tasks, demonstrating that output equivalence (similar answers) does not correlate with process equivalence (similar problem-solving methods), enabling AI agents and bots to be detected through behavioral analysis rather than task performance alone.