arXiv — cs.AI preprintsInternational9 October 2026
On the estimation and validity of AI time horizons---a statistical look at the METR plot
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arXiv:2610.12466v1 Announce Type: new Abstract: METR's 50\% time horizon measures the human completion time of software tasks that an AI solves with 50\% probability, allowing AI capabilities to be expressed in interpretable units. On 228 tasks and 26 AIs, we recompute the time horizons using splines and item-response theory to relax the assumption that the AI difficulty of a task depends linearly on the log of human time. Our fitted spline can be interpreted as a function that \emph{converts} human time to AI difficulty; it is nearly flat in a region from 2--30 min but close to linear elsewhe
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