In 2026, "hallucination rate" is a moving target. The figure you see depends...

https://alpha-wiki.win/index.php/Claude_vs._GPT:_Which_is_Better_at_Admitting_%22I_Don%27t_Know%22%3F

In 2026, "hallucination rate" is a moving target. The figure you see depends entirely on the benchmark used to test it. Comparing Vectara HHEM scores against AA-Omniscience results proves that one size rarely fits all