HalluWorld - Grid Causal: leaderboard
Metric: Hallucination rate (%) on the causal probes (forward simulation of fire, flood and pressure-plate mechanics, 9 levels) of HalluWorld-Grid (MiniGrid worlds whose ground truth comes from the environment state), micro-averaged over levels and serializers, temperature 0 where supported, thinking models at medium effort with up to 16k thinking tokens, every model at most 256 answer tokens; lower is better. Source: arxiv.org. Saturation forecast: Around August 2028. 15 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | Claude Sonnet 4.6 | 19.7 |
| 2 | Claude Opus 4.6 | 20.1 |
| 3 | GPT-5.4 Mini (Non-reasoning) | 22.2 |
| 4 | O3 Mini | 23.8 |
| 5 | Claude Sonnet 4.6 (Medium) | 24 |
| 6 | Claude Opus 4.6 (Medium) | 25.2 |
| 7 | GPT-5.5 (Medium) | 25.3 |
| 8 | O3 | 26 |
| 9 | GLM-5 (Non-reasoning) | 26.4 |
| 10 | GPT-4o | 29 |
| 11 | O4 Mini | 30.6 |
| 12 | GPT-4o Mini | 30.9 |
| 13 | Qwen 3 30B A3B (Non-reasoning) | 31.6 |
| 14 | DeepSeek V3 (0324) | 32.2 |
| 15 | Kimi K2.6 (Non-reasoning) | 47.4 |
Interactive version: theaggregate.ai/benchmark?slug=halluworld-grid-causal · How It Works · Data refreshed daily, snapshot 2026-10-07.