Vercel BlogArticle
Open weight takes 71.5% of tokens and 23% of spend
Open-weight is winning on volume, but closed-weight models at the high end (Kimi K3 priced four times above open-weight average) are capturing spend growth. This means the market is bifurcating: builders optimizing for cost go open-weight, builders optimizing for capability pay premium for closed-weight. For infrastructure players: you need both lanes to capture the full market. For model labs: open-weight competitiveness is forcing pricing discipline everywhere.