Each model gets four role scores from public benchmarks. Idea measures open-ended creativity. Plan measures structured reasoning, function-calling, and multi-step decomposition. Build measures implementation skill — SWE-bench, LiveCodeBench, terminal tasks. Review measures preference judgment.

raw vs adjusted

The raw score is the benchmark composite, normalized to 0-100. The adjusted score subtracts a reviewer-reservation penalty: when a vendor's models lead the direct LM Arena search/document review proxy, that proxy lead gets discounted from their Idea, Plan, and Build scores so vendors can't game their own preference evaluations.

Penalty coefficients differ by role: Build is penalized hardest (0.32), Plan moderately (0.18), Idea lightly (0.08). Review is never adjusted.

missing data

If a model is missing some metrics within a group, the group score blends from shrink-to-50 to trusting the present metrics across 60-80% group coverage. At 80% coverage and above, the present-weight mean is trusted directly.

Full math, role definitions, and source list →