LePhantomCite - Non-Agentic: leaderboard
Metric: F1 (%) of predicted hallucinated segments against the injected ground-truth segments (a prediction matches when either span contains the other), non-agentic setting: the model reads a legal brief excerpt with the agent prompt minus the belief-update and action-selection sections, with no database lookups; 390 test excerpts; higher is better. Source: arxiv.org. Saturation forecast: Around August 2027. 5 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | GPT-5 | 45.2 |
| 2 | Gemini 2.5 Flash | 32 |
| 3 | Qwen 3 8B | 20.7 |
| 4 | GPT-OSS-120B | 20 |
Interactive version: theaggregate.ai/benchmark?slug=lephantomcite-non-agentic · How It Works · Data refreshed daily, snapshot 2026-09-29.