No-CoT math time horizon
Only in system cards
Models solve math problems without a visible chain of thought. Scored as the human task length in minutes the model solves reliably.
Third-party UK AISI measurement. Higher means more reasoning without visible CoT, which UK AISI treats as less monitorable.
Made by UK AI Security Institute Released Jul 2026 Deception and alignment Tasks kept private Last in a system card Sep 2026
Last model added Sep 2026
- Level
- Competition The strongest students, in olympiad-style contests
- Scored
- Checked automatically A program checks the result against an answer key, unit tests or the expected final state.
- Answers
- Short answer A number, word or short string matched to a key.
2
System cards report it, from 1 lab
No scores here yet
No lab, leaderboard or Epoch AI run has reported a score for No-CoT math time horizon yet.
Labs report it only in system cards
We read the headline results of 479 launch posts from 51 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 |
|---|---|---|---|---|
| 3 Sep 2026 | GPT-6 Astra system card | 30.9 | UK AISI No-CoT math time horizon, 50%-reliability (9.3, Figure 41) | Monitorability |
| 9 Jul 2026 | GPT-5.6 Sol system card | 3.6 | UK AISI no-CoT math reasoning time horizon (9.2.2) | Monitorability |
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