TaxCalcBench: leaderboard
Metric: Correct Returns - Strict (%). Source: github.com. 25 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | Claude Fable 5.1 | 38 |
| 2 | GPT-5.6 Sol | 28 |
| 3 | Claude Fable 5 | 28 |
| 4 | GPT-5.5 | 24 |
| 5 | Claude Opus 5 | 20 |
| 6 | Claude Opus 4.8 | 18 |
| 7 | Gemini 3.7 Flash | 12 |
| 8 | Gemini 3.6 Flash | 10 |
| 9 | Muse Spark 1.2 | 8 |
| 10 | Kimi K3 | 6 |
| 11 | Claude Sonnet 5 | 6 |
| 12 | Gemini 3.5 Flash | 4 |
| 13 | Gemini 3.8 Flash | 4 |
| 14 | Gemini 3.1 Pro (Preview) | 2 |
Interactive version: theaggregate.ai/benchmark?slug=taxcalcbench · How It Works · Data refreshed daily, snapshot 2026-09-05.