What AI Saves
What AI changes in knowledge work, measured in trials and surveys. Each number is a range across primary studies.
about 1 to 2 of 40 hours in the week F-08 3–5.4%
of work hours saved, by AI users' own estimate
St. Louis Fed · Denmark · UK civil service 25 to 40 of every 100 minutes saved F-09 25–40%
less time on a defined writing task with AI
Noy and Zhang 2023 · Dell'Acqua et al. 2026 14 to 15 more issues per 100 F-10 14–15%
more issues resolved per hour by support agents with AI
Brynjolfsson, Li and Raymond 2025 · Alibaba 2026 21 to 26 of every 100 minutes saved F-11 21–26%
faster in company trials; all studies run from 19% slower to 56% faster
Google 2024 · Microsoft, Accenture 2025 · METR 2025 27 to 46 more per 100 for the weakest F-12 27–46%
gain for the newest or weakest workers; the strongest gain 0 to 17%
Brynjolfsson et al. 2025 · Dell'Acqua et al. 2023 · Cui et al. 2026 14 to 25 points worse out of 100 F-13 14–25%
worse results on tasks the AI handles poorly
Dell'Acqua et al. 2026 · METR 2025 · UK DBT 2025Each 5 by 8 grid is a 40-hour week: a row per day, a square per hour. Each 10 by 10 grid is 100%. Solid orange is the low end of the range across studies, light orange runs to the high end.
Methods, samples and links for every study are at evy.so/facts.