In 2026, "hallucination rate" is a useless metric unless you define your...

https://holdenlvxt779.theburnward.com/why-do-multi-turn-chats-repeat-earlier-hallucinations-3-20

In 2026, "hallucination rate" is a useless metric unless you define your yardstick. Benchmarks like Vectara HHEM and AA-Omniscience measure wildly different failure modes, from simple citation misses to complex reasoning errors