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

https://www.tumblr.com/gladlyradiantsphinx/816917315191980032/the-2500-sanction-why-the-5th-circuit-case

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