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. Saturation forecast: Around January 2027. 8 models tracked.
Top models
| # | Model | Score | Overall rank |
|---|---|---|---|
| 1 | GPT-5.5 | 22 | #31 |
| 2 | Claude Mythos Preview | 22 | #4 |
| 3 | Claude Opus 4.6 | 15.6 | #63 |
| 4 | GPT-5.4 | 14 | #79 |
| 5 | Claude Opus 4.5 | 11 | #83 |
| 6 | GPT-5.3 Codex | 11 | #69 |
| 7 | GPT-5.1 Codex | 9.8 | #159 |
| 8 | Claude Sonnet 4.5 | 9.4 | #142 |
No result here: #3 Claude Opus 5.5, #6 GPT-6 Astra, #7 GPT-6.1 Sol.
Interactive version: theaggregate.ai/benchmark?slug=aisi-cyber-tlo-100m · How It Works · Data refreshed daily, snapshot 2026-10-20.