Developer productivity study: AI increases completion time by 19%
"Before starting tasks, developers forecast that allowing AI will reduce completion time by 24%. After completing the study, developers estimate that allowing AI reduced completion time by 20%. Surprisingly, we find that allowing AI actually increases completion time by 19%—AI tooling slowed developers down."
https://metr.org/Early_2025_AI_Experienced_OS_Devs_Study.pdf
https://secondthoughts.ai/p/ai-coding-slowdown