Across 27 shared benchmarks, Claude Fable 5 scores higher on 13 and Muse Spark 1.3 on 13, with 1 level. The widest gap is OmniScience Non-Hallucination, where Muse Spark 1.3 scores 68.5 against 36.4. Muse Spark 1.3 is the cheaper of the two on tracked API pricing ($1.25 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 (direct, direct), otherwise the lowest tracked offer.