LAB-Bench CloningScenarios
Models answer multiple-choice questions about multi-step molecular cloning workflows. CloningScenarios subset of LAB-Bench.
33 public questions on multi-plasmid cloning workflows. PhD researchers score about 60%. LABBench2 carries a 14-task open-response cloning config.
In the authors’ words
There is widespread optimism that frontier Large Language Models (LLMs) and LLM-augmented systems have the potential to rapidly accelerate scientific discovery across disciplines. Today, many benchmarks exist to measure LLM knowledge and reasoning on textbook-style science questions, but few if any benchmarks are designed to evaluate language model performance on practical tasks required for scientific research, such as literature search, protocol planning, and data analysis. As a step toward building such benchmarks, we introduce the Language Agent Biology Benchmark (LAB-Bench), a broad dataset of over 2,400 multiple choice questions for evaluating AI systems on a range of practical biology research capabilities, including recall and reasoning over literature, interpretation of figures, access and navigation of databases, and comprehension and manipulation of DNA and protein sequences. Importantly, in contrast to previous scientific benchmarks, we expect that an AI system that can achieve consistently high scores on the more difficult LAB-Bench tasks would serve as a useful assistant for researchers in areas such as literature search and molecular cloning. As an initial assessment of the emergent scientific task capabilities of frontier language models, we measure performance of several against our benchmark and report results compared to human expert biology researchers. We will continue to update and expand LAB-Bench over time, and expect it to serve as a useful tool in the development of automated research systems going forward. A public subset of LAB-Bench is available for use at the following URL: https://huggingface.co/datasets/futurehouse/lab-bench
- 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
Gemini 3 Pro leads with 94.2% 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:
- GPT-6 Astra
- Claude Opus 5.5
- GPT-6.1 Terra
- GPT-6.1 Sol
- and 16 more
- 1
Gemini 3 Pro 94.2%
- 2 Claude Opus 4.5 75.8%
- 3 Claude Sonnet 4.5 66.7%
- 4 Claude Opus 4.1 56%
- 5
Gemini 2.5 Pro Jun 2025 53%
- 6 Grok 4.1 46%
- 7 Claude Haiku 4.5 45%
- 8
Gemini 2.5 Pro Mar 2025 44.1%
- 9
Gemini 2.5 Flash Jun 2025 44%
- 10 o1-mini 39.4%
- 11 o1-preview 36.4%
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | | 94.2% | Nov 2025 | Model card | |
| 2 | Claude Opus 4.5 | 75.8% | Nov 2025 | Model card | |
| 3 | Claude Sonnet 4.5 | 66.7% | Sep 2025 | Model card | |
| 4 | Claude Opus 4.1 | 56% | Aug 2025 | Model card | |
| 5 | | 53% | Jul 2025 | Model card | |
| 6 | Grok 4.1 | 46% | Nov 2025 | Model card | |
| 7 | Claude Haiku 4.5 | 45% | Oct 2025 | Model card | |
| 8 | | 44.1% | Apr 2025 | Model card | |
| 9 | | 44% | Jul 2025 | Model card | |
| 10 | o1-mini | 39.4% | Sep 2024 | Model card | |
| 11 | o1-preview | 36.4% | Sep 2024 | Model card |
6 models have held number one since its release in Jul 2024
Lab claims count from the day the card came out, independent runs from the model’s release.
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.
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.
14 system cards report it, from 4 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 Nov 2025 | Claude Opus 4.5 system card | 75.8 | LAB-Bench Cloning Scenarios, 10-shot, extended thinking, no tools, max across snapshots 0.758 (7.2.4.4) | Bio and chem risk |
| 18 Nov 2025 | | 94.2 | LAB-Bench Cloning Scenarios (N=33), mean solve rate, shuffled answer choices (Figure 1) | Bio and chem risk |
| 17 Nov 2025 | Grok 4.1 model card | 46 | CloningScenarios, accuracy 0.46, Grok 4.1 Thinking (Table 4) | Bio and chem risk |
| 15 Oct 2025 | Claude Haiku 4.5 system card | 45 | LAB-Bench Cloning Scenarios, k-shots=10, score 0.45 (6.2.3.1) | Bio and chem risk |
| 29 Sep 2025 | Claude Sonnet 4.5 system card | 66.7 | LAB-Bench Cloning Scenarios, 10-shot, no tools, score 0.667 (Figure 9.2.4.4.A) | Bio and chem risk |
| 5 Aug 2025 | Claude Opus 4.1 system card addendum | 56 | LAB-Bench subset Cloning Scenarios 0.56 (6.3.1.2) | Bio and chem risk |
| 7 Jul 2025 | | 53 | LAB-Bench Cloning Scenarios (N=33), mean solve rate (Figure 9) | Bio and chem risk |
| 7 Jul 2025 | | 44 | LAB-Bench Cloning Scenarios (N=33), mean solve rate (Figure 9) | Bio and chem risk |
| 22 May 2025 | Claude Sonnet 4 system card | LAB-Bench Cloning Scenarios, 0, 5 and 10 shots, extended thinking, chart without printed values (Figure 7.2.4.7.A) | Bio and chem risk | |
| 22 May 2025 | Claude Opus 4 system card | LAB-Bench Cloning Scenarios, 0, 5 and 10 shots, extended thinking, chart without printed values (Figure 7.2.4.7.A) | Bio and chem risk | |
| 28 Apr 2025 | | 44.1 | Cloning Scenarios (N=33), mean solve rate over 100 shuffled runs (Figure 1) | Bio and chem risk |
| 24 Feb 2025 | Claude 3.7 Sonnet system card | LabBench subset CloningScenarios, 0 and 5 shots with Bo1 to Bo10, 32k thinking, chart without printed values (Figures 18 and 19) | Bio and chem risk | |
| 12 Sep 2024 | o1-preview system card | 36.4 | LAB-Bench: Cloning Scenarios, pass rate cons@32, o1-preview (post-mitigation), printed chart label (4.3.5) | Bio and chem risk |
| 12 Sep 2024 | o1-mini system card | 39.4 | LAB-Bench: Cloning Scenarios, pass rate cons@32, o1-mini (post-mitigation), printed chart label (4.3.5) | Bio and chem risk |
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