P

weft · Production library run 2

29.9Library score
Pass rate64.2%
Simplicity55.6
Problems $$18.09

Implementers use the real production library (chumsky).

ImplementerPass rateSimplicityCostScore
DeepSeek V4.1 Flash · mini-SWE46.8%49.9$1.80
21.4
GLM 5.3 Flash · mini-SWE70.5%59.4$13.01
34.6
GPT-5.6 Luna · Codex75.2%57.6$3.27
33.7
ProblemDeepSeek V4.1 FlashGLM 5.3 FlashGPT-5.6 LunaMean
bag-rules0.038.220.819.6ninja-build31.86.234.824.2mail-addresses1.252.853.635.9property-paths0.134.855.230.1formula-ledger50.729.632.137.5record-spans56.157.721.645.1block-events44.066.939.150.0command-errors0.017.116.611.2route-tags41.230.350.240.6template-audit0.00.020.06.7grammar-inventory27.832.325.828.7grammar-trace46.859.853.653.4nesting-guard0.039.19.616.2unicode-spans0.019.139.119.4