Across 14 shared benchmarks, Claude Fable 5 scores higher on 13 and Quasar 438B on 1. The widest gap is OmniScience Accuracy, where Claude Fable 5 scores 65.3 against 15.5. Quasar 438B is the cheaper of the two on tracked API pricing ($0.60 against $10.00 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 (anthropic-official, direct), otherwise the lowest tracked offer.