F5 Labs AI Security Leaderboard - CASI: leaderboard
Metric: CASI (Comprehensive AI Security Index), 0-100, higher is more secure (September 2026 top-10 snapshot). Source: www.f5.com. 10 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | Claude Fable 5 | 98.03 |
| 2 | Claude Haiku 4.5 | 97.9 |
| 3 | Claude Sonnet 5 | 97.51 |
| 4 | Claude Opus 4.6 | 96.69 |
| 5 | Claude Opus 5 | 94.38 |
| 6 | GPT-5.4 Nano | 93.9 |
| 7 | Nemotron 3 Ultra | 91.83 |
| 8 | GPT-5.6 Luna | 90.3 |
| 9 | Qwen 3.8 Max | 89.81 |
| 10 | GPT-5.6 Terra | 88.64 |
Interactive version: theaggregate.ai/benchmark?slug=f5-labs-ai-security-leaderboard-casi · How It Works · Data refreshed daily, snapshot 2026-09-19.