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

https://www.scribd.com/document/1040257449/What-is-the-Columbia-Journalism-Review-citation-test-actually-showing-214602

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