Benchmark Almanac

Biosecurity VCT

Grok 4.6 47.8% Only in system cards

Models answer dual-use virus lab troubleshooting items. Accuracy counts should-refuse and should-comply items together.

In-house xAI companion to VCT. The tasks are not public, and the answer format is not stated.

Made by xAI (SpaceXAI) Released Aug 2026 Hazardous knowledge Tasks kept private Last in a system card Sep 2026 Last model added Sep 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
Multiple choice
2
Models scored in lab cards
2
System cards report it, from 1 lab

Grok 4.6 leads with 47.8%

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. 47.8 Grok 4.6
  2. 41.5 Grok 4.7
  1. 1 Grok 4.6 47.8%
  2. 2 Grok 4.7 41.5%
#ModelScoreSettingDateSource
1 Grok 4.6 47.8% Aug 2026 Model card
2 Grok 4.7 41.5% Sep 2026 Model card

Scores over time

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
0% 20% 40% 60% 80% 100% Near the ceiling (85%) Grok 4.6 0% 20% 40% 60% 80% 100% Near the ceiling (85%) Grok 4.6

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.

DateDocumentScoreAs the document writes itSection
21 Sep 2026 Grok 4.7 model card 41.5 Biosecurity VCT, accuracy, high (7.3) Bio and chem risk
12 Aug 2026 Grok 4.6 model card 47.8 Biosecurity VCT, accuracy, high (8.2) Bio and chem risk

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