AI now writes 52% of merged code, but DX researcher says stop treating AICP as a KPI
rseroter · x · 2026-10-10
DX researcher Brian Houck argues the AI Code Percentage metric has outlived its original purpose: weekly active AI coding tool usage exceeds 95% across 500+ companies, and AI-authored code jumped from 19% of merged code in Q3 2025 to 52% by Q2 2026.
Key points:
- AICP was a useful proxy for adoption when AI was new, but adoption is no longer in question, so it fails as a KPI
- It remains valuable as a research variable for cohort analysis across teams
- Treat it as a lens, not a target: if AICP rises without faster delivery, sustained quality, or less tedious work, AI may be exposing new bottlenecks rather than improving productivity
The takeaway: pair AICP with delivery speed, quality, and developer experience metrics instead of tracking it in isolation.
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