UK AISI narrow cyber tasks
Agents solve UK AISI cyber tasks graded by difficulty, including expert-level tasks. Scored as pass@5 and pass@1.
Third-party evaluation reported in OpenAI system cards. The tasks are not public.
- Made by
- UK AI Security Institute
- Released
- April 2026
- Kind
- Capture-the-flag challenges
- Level
- Expert
- Scored
- Checked automatically
- Answers
- Agent task
- Tasks
- Kept private
- Strongest model tested
- GPT-5.6 Sol #13 on the capability index
- Last in a system card
- July 2026
- Last model added
- July 2026
GPT-5.6 Sol leads with 95%
Best score per model as labs report them in their own cards. Labs pick their own settings, so these compare less cleanly than independent runs.
- 1 GPT-5.6 Sol 95%
- 2 GPT-5.5 90.5%
Source: Labs’ model cards
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | GPT-5.6 Sol | 95% | Jul 2026 | Lab model card | |
| 2 | GPT-5.5 | 90.5% | Apr 2026 | Lab model card |
OpenAI’s own number for GPT-5.5 passed 85% in April 2026
All the scores we have, one dot each, so a model tested at several settings appears more than once.
Source: Labs’ model cards
Labs report it only in system cards
We read the headline results of 522 launch posts from 52 labs, and none of them list this benchmark. Some system cards do, below.
2 system cards report it, from 1 lab
Besides launch posts, we read the system cards, model cards and technical reports labs publish with a release. They report far more, including safety and frontier-risk tests.
| Date | Document | Score | As the document writes it | Section |
|---|---|---|---|---|
| Jul 9, 2026 | GPT-5.6 Sol system card | 95 | UK AISI CTF expert-level tasks, 95.0% ± 9.8% (9.1.2.6) | Cyber risk |
| Apr 23, 2026 | GPT-5.5 system card | 90.5 | UK AISI expert-level narrow cyber tasks, pass@5 (pass@1 66.7%) (9.1.2.7) | Cyber risk |
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