xAI Grok 4.6 Model Card - Factuality (Hallucination): leaderboard
Metric: Hallucination Rate (%, lower is better). Source: media.x.ai. 4 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | Grok 4.5 (High) | 0.98 |
| 2 | GPT-5.5 (xHigh) | 1.1 |
| 3 | Grok 4.6 (High) | 1.7 |
| 4 | Claude Opus 4.8 (Max) | 3.4 |
Interactive version: theaggregate.ai/benchmark?slug=xai-grok-4-6-model-card-factuality-hallucination · How It Works · Data refreshed daily, snapshot 2026-09-19.