parcel-bundler/lightningcss
An extremely fast CSS parser, transformer, bundler, and minifier written in Rust.
Results by Model
| # | Model | Score Percentage of hidden behavioral tests passed. | Cost Total API cost in USD for this task instance. | Calls Number of LLM API calls for this task instance. | |
|---|---|---|---|---|---|
| 1 |  |
GPT 5.5 (xhigh) OpenAI | 55.0% | $8.05 | 68 |
| 2 |  |
Claude Opus 4.6 Anthropic | 53.6% | $17.40 | 312 |
| 3 | |
GPT 5.5 (high) OpenAI | 52.7% | $3.53 | 40 |
| 4 | |
Claude Sonnet 4.6 Anthropic | 49.9% | $45.82 | 705 |
| 5 | |
Claude Opus 4.7 (xhigh) Anthropic | 46.5% | $4.45 | 107 |
| 6 | |
GPT 5.5 OpenAI | 44.9% | $1.23 | 20 |
| 7 | |
Claude Opus 4.7 Anthropic | 43.2% | $1.26 | 46 |
| 8 |  |
Gemini 3 Flash Google | 43.0% | $0.33 | 117 |
| 9 | |
GPT 5.4 OpenAI | 36.7% | $0.25 | 12 |
| 10 | |
GPT 5 mini OpenAI | 36.6% | $0.03 | 23 |
| 11 | |
Gemini 3.1 Pro Google | 34.0% | $1.22 | 91 |
| 12 | |
GPT 5.4 mini OpenAI | 31.8% | $0.03 | 22 |
| 13 | |
Claude Haiku 4.5 Anthropic | 28.7% | $1.29 | 165 |
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