Hallucination rates aren't fixed; they depend on the benchmark. Using Vectara...

https://xeon-wiki.win/index.php/Why_is_GPT-5.5_57%25_Accurate_but_86%25_Hallucination_on_AA-Omniscience%3F

Hallucination rates aren't fixed; they depend on the benchmark. Using Vectara HHEM or AA-Omniscience changes your risk profile. With accuracy issues costing firms $67.4B in 2024, treat scores as contextual