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Physical World & Real-World ImpactMETR

METR's developer productivity RCT

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Developer productivity RCT — developers were actually 19% slower, while they themselves felt 20% faster

Why it matters

The first RCT to measure a gap running in opposite directions between perceived and measured speed

Source — Primary sources first; secondary reports are labelled “Press”

Officialmetr.orghttps://metr.org/blog/2025-07-10-early-2025-ai-experienced-os-dev-study/

Added in Week 35, 2026 · See that week

On the map — ⑭ Physical World line

  1. Previous stopMasked autoencoder self-pretraining applied to microelectronics defect detection
  2. This recordMETR's developer productivity RCT
  3. Next stopGemini Robotics 1.5
See it on the map

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