UK AISI sabotage continuation evaluation
Agents resume trajectories where sabotage of safety research already began. Scored on the share of trajectories where they actively continue the sabotage.
Third-party UK AISI evaluation reported in OpenAI and Anthropic system cards.
- Level
- Expert Specialists with years of training, often over hours of work
- Scored
- Graded by people Human experts grade or compare the outputs.
- Answers
- Agent task Many steps in a terminal, browser, desktop, app, game or robot.
Claude Opus 4.7 leads with 0% among models released by Jul 2026
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.
The newest model with a score here came out in Jul 2026, and nobody has reported a newer one. Among the 20 highest-ranked models on the capability index, these have no score yet:
- GPT-6 Astra
- Claude Opus 5.5
- GPT-6.1 Terra
- GPT-6.1 Sol
- and 13 more
- 1 Claude Opus 4.7 0%
- 2 Claude Opus 5 0.10%
- 3 Claude Opus 4.8 1.00%
- 4 GPT-5.6 Sol 1.00%
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Claude Opus 4.7 | 0% | Apr 2026 | Model card | |
| 2 | Claude Opus 5 | 0.10% | Jul 2026 | Model card | |
| 3 | Claude Opus 4.8 | 1.00% | May 2026 | Model card | |
| 4 | GPT-5.6 Sol | 1.00% | Jul 2026 | Model card |
Number one over time
Lab claims count from the day the card came out, independent runs from the model’s release.
Scores over time
All the scores we have, one dot each, so a model tested at several settings appears more than once.
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.
4 system cards report it, from 2 labs
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 |
|---|---|---|---|---|
| 24 Jul 2026 | Claude Opus 5 system card | 0.1 | UK AISI continuation evaluation, actively continued compromising safety research in 2 of 1,482 samples (0.1%), reasoning-output discrepancy 1.6%, verbalized evaluation awareness 2.8%, lower is better (6.4.8) | Alignment |
| 9 Jul 2026 | GPT-5.6 Sol system card | 1 | UK AISI continuation evaluation, actively continued sabotage in approximately 1% of trajectories (9.2.1) | Alignment |
| 28 May 2026 | Claude Opus 4.8 system card | 1 | UK AISI sabotage continuation, early checkpoint, actively continued the sabotage attempt 1% of the time. Verbalized evaluation awareness 1.2%, real versus synthetic deployment data told apart at 79% accuracy, lower is better (6.2.4) | Alignment |
| 16 Apr 2026 | Claude Opus 4.7 system card | 0 | UK AISI continuation evaluation, actively continues compromising research 0% of the time. Unprompted evaluation awareness 3.4%, prompted eval-vs-deployment accuracy 62% (6.2.4) | Alignment |
More in Safety and alignment
- FORTRESS In use Paired adversarial and benign national-security misuse prompts. Rubric-graded risk score on adversarial and over-refusal score on benign prompts. Claude Opus 5.5 5.78%
- StrongREJECT In use Forbidden-prompt jailbreak benchmark with a rubric grader that scores how useful a non-refusal actually is.
Inkling 98.6% - AgentDojo In use Agents do tool-use tasks while tools and data carry prompt injections. Attack success rate counts hijacked runs. Grok 4 Fast 0%
- MASK In use Measures whether a model contradicts its own elicited beliefs under pressure to lie. Honesty separated from accuracy.
Muse Spark Open 98.1% - Gray Swan IPI Arena benchmark In use Indirect prompt-injection attacks from public red-teaming competitions replayed on tool, coding and browser agents. Attack success rate at k attempts. GPT-6 Astra 8.50%
- Agentic misalignment suite (Anthropic) In use Agents in simulated company settings face threats or goal conflicts that invite blackmail, leaking or sabotage. Score is the misaligned action rate. Claude Sonnet 4.5 0%