vCX-Hard - Non-Hallucination (Reasoning): leaderboard
Metric: Non-Hallucination Rate (%). Source: www.retellai.com. 27 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | GPT-5.5 | 88 |
| 2 | Gemini 3.1 Pro (Preview) | 83.6 |
| 3 | GPT-5.4 | 83.3 |
| 4 | GLM-5.1 | 82.7 |
| 5 | Claude Sonnet 4.6 | 81.6 |
| 6 | GPT-5.2 | 81.6 |
| 7 | GPT-5.1 | 81 |
| 8 | Gemini 3.5 Flash | 80.7 |
| 9 | Claude Sonnet 4.5 | 80.6 |
| 10 | Gemini 3 Flash | 80.1 |
| 11 | GPT-5 | 78.8 |
| 12 | Claude Haiku 4.5 | 78.7 |
| 13 | Gemini 3.1 Flash Lite | 77.7 |
| 14 | Gemini 2.5 Pro | 77.2 |
| 15 | Grok 4.3 | 76.3 |
Interactive version: theaggregate.ai/benchmark?slug=vcx-hard-non-hallucination-reasoning · How It Works · Data refreshed daily, snapshot 2026-09-21.