Across 38 shared benchmarks, Kimi K2.5 scores higher on 22 and Nemotron 3 Ultra 550B A55B on 14, with 2 level. The widest gap is τ³-Bench, where Kimi K2.5 scores 66 against 22.6. Tracked API pricing per million tokens: Kimi K2.5 $0.60 in / $3.12 out, Nemotron 3 Ultra 550B A55B $0.68 in / $2.67 out.
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 (moonshot-official, direct), otherwise the lowest tracked offer.