RHELM (RAG Top-20) - Hallucination: leaderboard
Metric: Accuracy (%; 197 hallucination questions, LLM judge, dialogue history plus external sources, dense top-20 retrieval). Source: arxiv.org. Saturation forecast: Around December 2026. 4 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | Gemini 2.5 Pro | 64.5 |
| 2 | Claude Opus 4.5 | 60.9 |
| 3 | GPT-4.1 | 19.8 |
| 4 | GPT-4.1 Mini | 13.2 |
Interactive version: theaggregate.ai/benchmark?slug=rhelm-rag-top-20-hallucination · How It Works · Data refreshed daily, snapshot 2026-09-25.