github.com · Leaderboards
Public leaderboard that scores how often models introduce unsupported facts when summarizing documents, using Vectara's open HHEM evaluation model.
Vectara Hallucination Leaderboard is one of 11 leaderboard tools on TrueIQ. See all leaderboard tools or how we check facts.
// guides
What is faithfulness in RAG evaluation? The share of an answer's claims backed by the retrieved context, and how Ragas, DeepEval, TruLens and HHEM score it.
How LLM hallucination detection works in 2026: faithfulness checks, detector models like HHEM, self consistency and semantic entropy, and the tools to use.
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