Agent Arena - Tool Hallucination — leaderboard
Metric: Tool Hallucination (%). Source: arena.ai. 38 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | Gemini 3 Flash | 0.03 |
| 2 | Nemotron 3 Ultra | 0.09 |
| 3 | Claude Opus 4.8 (Thinking) | 0.22 |
| 4 | Grok Build 0.1 | 0.78 |
| 5 | Qwen 3.7 Max | 0.83 |
| 6 | Hy3 | 0.89 |
| 7 | Gemini 3.5 Flash (Medium) | 0.91 |
| 8 | Claude Sonnet 5 (High) | 1.25 |
| 9 | Claude Opus 4.7 (Thinking) | 1.28 |
| 10 | Gemini 3.1 Pro (Preview) | 1.32 |
| 11 | Claude Opus 4.7 | 1.33 |
| 12 | Claude Sonnet 4.6 | 1.35 |
| 13 | GPT-5.5 | 1.39 |
| 14 | Claude Opus 4.6 | 1.39 |
| 15 | GLM-5.1 | 1.39 |
Interactive version: theaggregate.ai/benchmark?slug=agent-arena-tool-hallucination · How the rankings work · Data refreshed daily, snapshot 2026-07-22.