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Measuring AI Ability to Complete Long Tasks; Time Horizon 1.1

METR · METR · March 2025; January 2026

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METR’s time-horizon methodology and its January 2026 Time Horizon 1.1 update. Update: https://metr.org/blog/2026-1-29-time-horizon-1-1/

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METR. ‘Measuring AI Ability to Complete Long Tasks.’ March 2025; ‘Time Horizon 1.1.’ January 2026.