HalluCXR: leaderboard
Metric: Hallucination rate (%): share of responses with at least one fabricated or omitted CheXpert finding by negation-aware keyword detection, over 856 MIMIC-CXR radiographs and three query types (report, targeted yes/no question, differential diagnosis), temperature 0; lower is better. Source: arxiv.org. Saturation forecast: Around February 2028. 5 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | GPT-5.1 | 71.1 |
| 2 | Gemini 3 Flash | 71.2 |
Interactive version: theaggregate.ai/benchmark?slug=hallucxr · How It Works · Data refreshed daily, snapshot 2026-10-07.