parcel-bundler/lightningcss
An extremely fast CSS parser, transformer, bundler, and minifier written in Rust.
2,828
Generated Behavioral Tests
63.1%
Best Score
GPT-5.6 Sol (xhigh)
Results by Model
Hover a point for details · The line marks the Pareto frontier (best score per cost) · Click a point to see model details
Per-Model Results
21 runs| # | Model | Score | Cost | Calls | ||
|---|---|---|---|---|---|---|
| 1 |  |
GPT-5.6 Sol (xhigh) | 63.1% | $12.01 | 80 | trace → |
| 2 |  |
Claude Opus 5 (xhigh) | 60.3% | $15.28 | 137 | trace → |
| 3 | |
GPT 5.5 (xhigh) | 55.0% | $8.05 | 68 | trace → |
| 4 | |
Claude Opus 4.6 | 53.6% | $17.40 | 312 | trace → |
| 5 | |
GPT 5.5 (high) | 52.7% | $3.53 | 40 | trace → |
| 6 |  |
Gemini 3.7 Flash | 52.2% | $0.99 | 100 | trace → |
| 7 | |
Claude Sonnet 4.6 | 49.9% | $45.82 | 705 | trace → |
| 8 |  |
GLM-5.2 | 49.8% | $21.12 | 247 | trace → |
| 9 | |
Gemini 3.5 Flash | 49.7% | $6.09 | 211 | trace → |
| 10 | |
Claude Opus 4.7 (xhigh) | 46.5% | $4.45 | 107 | trace → |
| 11 | |
GPT-5.6 Sol | 45.0% | $1.33 | 17 | trace → |
| 12 | |
GPT 5.5 | 44.9% | $1.23 | 20 | trace → |
| 13 | |
Claude Opus 4.7 | 43.2% | $1.26 | 46 | trace → |
| 14 | |
Gemini 3 Flash | 43.0% | $0.33 | 117 | trace → |
| 15 | |
Gemini 3.6 Flash | 38.4% | $3.18 | 147 | trace → |
| 16 | |
GPT 5.4 | 36.7% | $0.25 | 12 | trace → |
| 17 | |
GPT 5 mini | 36.6% | $0.03 | 23 | trace → |
| 18 | |
Gemini 3.1 Pro | 34.0% | $1.22 | 91 | trace → |
| 19 | |
GPT 5.4 mini | 31.8% | $0.03 | 22 | trace → |
| 20 | |
Claude Haiku 4.5 | 28.7% | $1.29 | 165 | trace → |
| 21 | |
Claude Opus 4.8 (xhigh) | 0.7% | $18.78 | 118 | trace → |
Click a row to replay how that model rebuilt this program, or the model name to open its full run