Hallucination rates depend on the yardstick. Whether you measure via Vectara...

https://www.bust-bookmark.win/in-2026-hallucination-rate-isn-t-a-universal-score-it-s-a-byproduct-of-how

Hallucination rates depend on the yardstick. Whether you measure via Vectara HHEM or HalluHard—where models hit 30.2% failure—results vary wildly. In 2026, don’t ask if your AI is accurate; ask which benchmark fits your use case