Across 63 shared benchmarks, Kimi K2.6 scores higher on 51 and Nemotron 3 Ultra 550B A55B on 11, with 1 level. The widest gap is Apex (Pass@1), where Nemotron 3 Ultra 550B A55B scores 84.8 against 24. Nemotron 3 Ultra 550B A55B is the cheaper of the two on tracked API pricing ($0.68 against $0.95 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.