AISI Cyber TLO 100M — leaderboard
AISI cyber range: "The Last Ones" — a 32-step corporate network attack simulation requiring reconnaissance, lateral movement, credential theft, reverse engineering, and data exfiltration. Avg steps completed at 100M token budget. Some scores are approximate (read from charts).
Metric: Avg Steps (/32). Source: www.aisi.gov.uk. Status: years away from saturation. 8 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | Human Expert | 32 |
| 2 | GPT-5.5 | 22 |
| 3 | Claude Mythos Preview | 22 |
| 4 | Claude Opus 4.6 | 15.6 |
| 5 | GPT-5.4 | 14 |
| 6 | Claude Opus 4.5 | 11 |
| 7 | GPT-5.3 Codex | 11 |
| 8 | GPT-5.1 Codex | 9.8 |
| 9 | Claude Sonnet 4.5 | 9.4 |
Interactive version: theaggregate.ai/benchmark?slug=aisi-cyber-tlo-100m · How the rankings work · Data refreshed daily, snapshot 2026-07-22.