Vectara Hallucination Leaderboard (HHEM)
EvalsBenchmark / dataset
Grounded summarization hallucination rates across models.
- Category
- Hallucination & factuality
- Insurance exposure
- Hallucination
- Publisher
- Vectara
- Publisher type
- Company (open source)
- License
- Apache-2.0
- Status
- Active (<90d)
- Last commit
- 2026-09-23
- Stars
- 3320
- Notes
- Model-level hallucination rates. Usable as a pricing input.
Wanich Risk Lab, 2026.