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parcel-bundler/lightningcss

An extremely fast CSS parser, transformer, bundler, and minifier written in Rust.

7,515 rs hard
2,828
Generated Behavioral Tests
53.6%
Best Score

Results by Model

# Model Score help_outline Percentage of hidden behavioral tests passed. Cost help_outline Total API cost in USD for this task instance. Calls help_outline Number of LLM API calls for this task instance.
1 Claude Opus 4.6 Anthropic 53.6% $17.40 312
2 Claude Sonnet 4.6 Anthropic 49.9% $45.82 705
3 Claude Opus 4.7 Anthropic 43.2% $1.26 46
4 Gemini 3 Flash Google 43.0% $0.33 117
5 GPT 5.4 OpenAI 36.7% $0.25 12
6 GPT 5 mini OpenAI 36.6% $0.03 23
7 Gemini 3.1 Pro Google 34.0% $1.22 91
8 GPT 5.4 mini OpenAI 31.8% $0.03 22
9 Claude Haiku 4.5 Anthropic 28.7% $1.29 165

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