WTM-Bench (Python): leaderboard
Metric: Hard score (%; share of tasks whose output workbook matches the target exactly, a perfect soft score; the model drives Excel through Python with openpyxl; 150 WTM-Bench tasks at query level 3 (concise, abstract requests); the authors' tool-calling loop that executes code against the workbook, shows the resulting workbook state and allows up to 10 turns; deterministic programmatic grading). Source: arxiv.org. Saturation forecast: Around 2028. 6 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | GPT-5.4 | 20 |
| 2 | Claude Opus 4.6 | 18.7 |
| 3 | Claude Sonnet 4.5 | 16.7 |
| 4 | GPT-5.2 | 15.3 |
| 5 | Claude Haiku 4.5 | 10 |
| 6 | GPT-4.1 Mini | 7.3 |
Interactive version: theaggregate.ai/benchmark?slug=wtm-bench-python · How It Works · Data refreshed daily, snapshot 2026-09-29.