Across 30 shared benchmarks, Claude Opus 4.8 scores higher on 10 and Gemini 3.8 Flash on 20. The widest gap is GDP (Surge AI), where Claude Opus 4.8 scores 84.8 against 35. Gemini 3.8 Flash is the cheaper of the two on tracked API pricing ($0.75 against $5.00 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, google-official), otherwise the lowest tracked offer.