WTM-Bench (Python) - Soft Score: leaderboard
Metric: Soft score (%; weighted component similarity of cells, formulas, charts, pivot tables and conditional formatting to the target workbook, partial credit; 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 August 2027. 6 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | Claude Opus 4.6 | 48.6 |
| 2 | GPT-5.4 | 46.3 |
| 3 | GPT-5.2 | 44.6 |
| 4 | Claude Sonnet 4.5 | 40.4 |
| 5 | Claude Haiku 4.5 | 33.7 |
| 6 | GPT-4.1 Mini | 26 |
Interactive version: theaggregate.ai/benchmark?slug=wtm-bench-python-soft-score · How It Works · Data refreshed daily, snapshot 2026-09-29.