Benchmark Almanac

WMDP Biology

OpenAI deep research 90% leads since Feb 2025 Only in system cards

Models answer 1,273 multiple-choice questions that proxy hazardous biosecurity knowledge. Biology split of WMDP.

Subset of the WMDP benchmark. 1,273 test questions in the Hugging Face config, MIT licensed. A cybersecurity split also exists.

In the authors’ words

The White House Executive Order on Artificial Intelligence highlights the risks of large language models (LLMs) empowering malicious actors in developing biological, cyber, and chemical weapons. To measure these risks of malicious use, government institutions and major AI labs are developing evaluations for hazardous capabilities in LLMs. However, current evaluations are private, preventing further research into mitigating risk. Furthermore, they focus on only a few, highly specific pathways for malicious use. To fill these gaps, we publicly release the Weapons of Mass Destruction Proxy (WMDP) benchmark, a dataset of 3,668 multiple-choice questions that serve as a proxy measurement of hazardous knowledge in biosecurity, cybersecurity, and chemical security. WMDP was developed by a consortium of academics and technical consultants, and was stringently filtered to eliminate sensitive information prior to public release. WMDP serves two roles: first, as an evaluation for hazardous knowledge in LLMs, and second, as a benchmark for unlearning methods to remove such hazardous knowledge. To guide progress on unlearning, we develop RMU, a state-of-the-art unlearning method based on controlling model representations. RMU reduces model performance on WMDP while maintaining general capabilities in areas such as biology and computer science, suggesting that unlearning may be a concrete path towards reducing malicious use from LLMs. We release our benchmark and code publicly at https://wmdp.ai

Abstract of The WMDP Benchmark: Measuring and Reducing Malicious Use With Unlearning (arXiv:2403.03218, CC0)
Made by CAIS + Scale AI et al. Released Mar 2024 Hazardous knowledge All tasks public Last in a system card Nov 2025 Last model added Nov 2025
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
7
Models scored in lab cards
7
System cards report it, from 3 labs

OpenAI deep research leads with 90% among models released by Nov 2025

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 Nov 2025, and nobody has reported a newer one. Among the 20 highest-ranked models on the capability index, these have no score yet:

  1. 1 OpenAI deep research 90%
  2. 2 Gemini 3 Pro 88.2%
  3. 3 Gemini 2.5 Pro Jun 2025 86%
  4. 4 GPT-4.5 85%
  5. 5 Gemini 2.5 Pro Mar 2025 84.3%
  6. 6 Gemini 2.5 Flash Jun 2025 84%
  7. 7 Code World Model (CWM) 78.1%
#ModelScoreSettingDateSource
1 OpenAI deep research 90% Feb 2025 Model card
2 Gemini 3 Pro 88.2% Nov 2025 Model card
3 Gemini 2.5 Pro Jun 2025 86% Jul 2025 Model card
4 GPT-4.5 85% Feb 2025 Model card
5 Gemini 2.5 Pro Mar 2025 84.3% Apr 2025 Model card
6 Gemini 2.5 Flash Jun 2025 84% Jul 2025 Model card
7 Code World Model (CWM) 78.1% Oct 2025 Model card

Number one over time

Lab claims count from the day the card came out, independent runs from the model’s release.

OpenAI
Lab claims Passed 85% in Feb 2025, by OpenAI deep research

The best score passed 85% in Feb 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
0% 20% 40% 60% 80% 100% 2025 2026 Near the ceiling (85%) OpenAI deep research 0% 20% 40% 60% 80% 100% 2025 2026 Near the ceiling (85%) OpenAI deep research

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.

7 system cards report it, from 3 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.

DateDocumentScoreAs the document writes itSection
18 Nov 2025 Gemini 3 Pro system card 88.2 WMDP BIO (N=1273), mean solve rate, shuffled answer choices (Figure 1) Bio and chem risk
8 Oct 2025 Code World Model (CWM) technical report 78.1 WMDP-Bio (Table 8) Bio and chem risk
7 Jul 2025 Gemini 2.5 Pro technical report 86 WMDP BIO (N=1273), mean solve rate (Figure 9) Bio and chem risk
7 Jul 2025 Gemini 2.5 Flash technical report 84 WMDP BIO (N=1273), mean solve rate (Figure 9) Bio and chem risk
28 Apr 2025 Gemini 2.5 Pro model card 84.3 WMDP BIO (N=1273), mean solve rate over 100 shuffled runs (Figure 1) Bio and chem risk
27 Feb 2025 GPT-4.5 system card 85 WMDP Biology, 1,520 questions, post-mitigation (4.3.6) Bio and chem risk
25 Feb 2025 OpenAI deep research system card 90 WMDP Biology, 1,520 questions, cons@4, post-mitigation with browsing, text and printed chart label (without browsing 87%) (3.4.4) Bio and chem risk

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