Hallucination rates depend on the benchmark. Vectara HHEM and AA-Omniscience...

https://www.stealth-bookmark.win/stop-asking-if-your-llm-hallucinates-and-start-asking-which-benchmark-it

Hallucination rates depend on the benchmark. Vectara HHEM and AA-Omniscience reveal different failure modes. With $67.4B lost to bad data, stop trusting vendor averages. Demand testing that mirrors your unique, real-world operational risks