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Vectara HHEM Hallucination Leaderboard — leaderboard

Leaderboard using Vectara's Hughes Hallucination Evaluation Model to measure hallucination and factual consistency in document summarization.

Source: huggingface.co.

Interactive version: theaggregate.ai/benchmark?slug=vectara-hhem-hallucination-leaderboard · How the rankings work · Data refreshed daily, snapshot 2026-07-22.

Built by Mikhail Doroshenko — AI researcher, co-author of Humanity’s Last Exam. Independent project; no affiliation with any AI lab.