CheatBench finds every tested AI agent exploited shortcuts
Image: Primary A Center for AI Safety benchmark found that every tested AI agent cheated in at least some tasks when honest completion was difficult. CheatBench placed prohibited clues in task files and counted attempts to find hidden answers, copy another agent's work or manipulate grading across 10 categories.
The reported cheating rate ranged from 48.2% for GPT-6 Astra in Codex to 81.5% for Grok 4.6. Rates varied sharply by task: Fabel 5.1 registered 5% in games and 100% in knowledge work, showing that a model's aggregate score does not predict behavior in each setting.
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