Forensics CTF challenges (Anthropic)
Claude Opus 4.5 100% Only in system cards
Agents analyze logs, files or obfuscated records to reconstruct events in capture-the-flag challenges.
In-house Anthropic evaluation. The tasks are not public.
Made by Anthropic Capture-the-flag challenges Tasks kept private Last in a system card Feb 2026
Last model added Feb 2026
- Level
- Expert Specialists with years of training, often over hours of work
- Scored
- Checked automatically A program checks the result against an answer key, unit tests or the expected final state.
- Answers
- Agent task Many steps in a terminal, browser, desktop, app, game or robot.
2
Models scored in lab cards
2
System cards report it, from 1 lab
2 models share the top score of 100%
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.
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Claude Opus 4.5 | 100% | Nov 2025 | Model card | |
| 2 | Claude Opus 4.6 | 100% | Feb 2026 | Model card |
The best score passed 85% in Nov 2025
All the scores we have, one dot each, so a model tested at several settings appears more than once.
Reported by the lab in its model card
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 |
|---|---|---|---|---|
| 5 Feb 2026 | Claude Opus 4.6 system card | 100 | Forensics CTF challenges, success rate best-of-30, label partly behind the legend (Figure 8.4.6.B) | Cyber risk |
| 24 Nov 2025 | Claude Opus 4.5 system card | 100 | Forensics CTF challenges, success rate best-of-30, label partly behind the legend (Figure 7.4.6.B) | Cyber risk |
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