In 2026, a "hallucination rate" is just a number until you define the stress...

https://www.mediafire.com/file/ex8a71ev923hbwn/pdf-22694-13739.pdf/file

In 2026, a "hallucination rate" is just a number until you define the stress test. Use Vectara’s HHEM for retrieval fidelity or AA-Omniscience for deeper reasoning, and you’ll get wildly different results