Cerno – CAPTCHA that targets LLM reasoning, not human biology

In plain words

Cerno is a CAPTCHA system designed to verify humans by testing reasoning abilities rather than requiring users to solve visual puzzles or other biology-based challenges. It targets large language models specifically, making it difficult for AI systems to pass while remaining accessible to human users. The tool is aimed at developers and website administrators seeking alternative verification methods that focus on cognitive tasks instead of traditional human perception tests.

written from the facts on this page · September 2026

From the sources

Motor-control analysis of maze interaction. Open-source TypeScript SDK. Openfrom cerno.sh

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