Across 27 shared benchmarks, Claude Sonnet 4.6 scores higher on 25 and Kimi K2 Instruct on 2. The widest gap is HLE, where Claude Sonnet 4.6 scores 49 against 7.9. Kimi K2 Instruct is the cheaper of the two on tracked API pricing ($0.60 against $3.00 per million input tokens).
Best tracked score per model per benchmark (default configuration; source-attributed). ↓ marks lower-is-better metrics. Open either model for its full surface, provenance and pricing. Quoted rates are the price-setter row we currently track for each model — its direct or vendor-official listing where one exists (direct, direct), otherwise the lowest tracked offer.