HELM Safety HarmBench — leaderboard
Metric: LM Evaluated Safety score (%). Source: storage.googleapis.com. 87 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | GPT-OSS-120B | 100 |
| 2 | GPT-OSS-20B | 98.7 |
| 3 | GPT-5 Nano | 98.4 |
| 4 | O3 (2025-04-16) | 98.4 |
| 5 | Claude 3.5 Sonnet (20240620) | 98.1 |
| 6 | GPT-5 | 97.6 |
| 7 | GPT-5.1 | 97.6 |
| 8 | Kimi K2 | 97.4 |
| 9 | Claude 3 Opus (20240229) | 97.4 |
| 10 | GPT-5 Mini | 97.1 |
| 11 | O4 Mini (2025-04-16) | 97 |
| 12 | O1 (2024-12-17) | 96.3 |
| 13 | Claude Haiku 4.5 (20251001) | 95.9 |
| 14 | Claude 3 Sonnet (20240229) | 95.8 |
| 15 | GPT-4.5 (Preview) | 95.8 |
Interactive version: theaggregate.ai/benchmark?slug=helm-safety-harmbench · How the rankings work · Data refreshed daily, snapshot 2026-07-22.