In 2026, there’s no "master" hallucination rate. Vectara’s HHEM and...

https://wiki-club.win/index.php/Is_HaluEval_Broken_if_a_Length_Rule_Gets_93.3%25_Accuracy%3F

In 2026, there’s no "master" hallucination rate. Vectara’s HHEM and AA-Omniscience yield different results by measuring different failure modes. With $67 billion lost to AI errors annually, choosing the right benchmark is a critical business decision