One hundred forty-four LLM bars charted by cost-per-token, colored by provider with a Tableau10 legend, and sorted ascending. Prices come from openrouter.ai/docs/models, with free, beta, dated, and extended versions filtered out. The chart uses D3's `scaleBand`, `scaleLinear`, and a custom `selectTicks` algorithm for axis gap-filling, while `data.json` supplies structured model metadata.