METR

Time Horizon Benchmark

METR Time Horizon goes vertical: Opus 4.6 hits ~14.5-hour tasks

METR's updated Time Horizon benchmark shows Claude Opus 4.6 completing tasks equivalent to roughly 14.5 hours of expert human work, with the autonomy doubling time now cited at 49 days. The panel treated this as the week's strongest evidence that agent capability growth has entered a visibly faster phase.