Benchmark Almanac

LAB-Bench CloningScenarios

Gemini 3 Pro 94.2% leads since Nov 2025 Only in system cards

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

Abstract of LAB-Bench: Measuring Capabilities of Language Models for Biology Research (arXiv:2407.10362, CC0)
Made by FutureHouse Released Jul 2024 Lab protocols 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
11
Models scored in lab cards
14
System cards report it, from 4 labs

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:

  1. 1 Gemini 3 Pro 94.2%
  2. 2 Claude Opus 4.5 75.8%
  3. 3 Claude Sonnet 4.5 66.7%
  4. 4 Claude Opus 4.1 56%
  5. 5 Gemini 2.5 Pro Jun 2025 53%
  6. 6 Grok 4.1 46%
  7. 7 Claude Haiku 4.5 45%
  8. 8 Gemini 2.5 Pro Mar 2025 44.1%
  9. 9 Gemini 2.5 Flash Jun 2025 44%
  10. 10 o1-mini 39.4%
  11. 11 o1-preview 36.4%
#ModelScoreSettingDateSource
1 Gemini 3 Pro 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 Gemini 2.5 Pro Jun 2025 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 Gemini 2.5 Pro Mar 2025 44.1% Apr 2025 Model card
9 Gemini 2.5 Flash Jun 2025 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.

OpenAI Google DeepMind Anthropic
Lab claims Passed 85% in Nov 2025, by Gemini 3 Pro
Gemini 3 Pro 94.2%

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 Best so far
0% 20% 40% 60% 80% 100% 2025 2026 Near the ceiling (85%) Gemini 3 Pro Claude Sonnet 4.5 Claude Opus 4.1 Gemini 2.5 Pro o1-mini 0% 20% 40% 60% 80% 100% 2025 2026 Near the ceiling (85%) Gemini 3 Pro Claude Sonnet 4.5

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.

DateDocumentScoreAs the document writes itSection
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 Gemini 3 Pro system card 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 Gemini 2.5 Pro technical report 53 LAB-Bench Cloning Scenarios (N=33), mean solve rate (Figure 9) Bio and chem risk
7 Jul 2025 Gemini 2.5 Flash technical report 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 Gemini 2.5 Pro model card 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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