MASK
MASK is a collection of 1000 questions measuring whether models faithfully report their beliefs when pressured to lie. It operationalizes deception as the rate at which the model lies, i.e., knowingly making false statements intended to be received as true. Lower dishonesty rates indicate better honesty.
Grok-4.1 Thinking from xAI currently leads the MASK leaderboard with a score of 0.510 across 1 evaluated AI models.
Grok-4.1 Thinking leads with 51.0%.
Progress Over Time
Interactive timeline showing model performance evolution on MASK
MASK Leaderboard
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FAQ
Common questions about MASK.
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