LabOSBench - Preparation & Sample Handling: leaderboard
Preparation and sample-handling operations in LabOSBench (Zou et al., 2026), such as venting and pumping chambers and selecting, loading or placing specimens, across its web-based scientific-instrument simulators. Each subtask starts from its canonical pre-state with a 50-step budget and runs twice; the score is the percent of successful runs averaged over the category's subtasks; higher is better.
Metric: Subtask Success Rate (%; mean over the category's operation-level subtasks, 2 runs each). Source: arxiv.org. Saturation forecast: Estimated already saturated. 9 models tracked.
Top models
| # | Model | Score | Overall rank |
|---|---|---|---|
| 1 | Seed-1.6 | 97.1 | #447 |
| 2 | GPT-5.5 | 82.4 | #48 |
| 3 | Claude Opus 4.5 | 82.4 | #152 |
| 4 | Claude Sonnet 4.5 | 76.5 | #244 |
| 5 | Kimi K2.5 | 76.5 | #252 |
No result here: #1 Claude Fable 5.2, #2 Gemini 4 Carbon, #5 Claude Opus 5.5.
Interactive version: theaggregate.ai/benchmark?slug=labosbench-preparation-sample-handling · How It Works · Data refreshed daily, snapshot 2026-11-12.