Across 14 shared benchmarks, Claude Fable 5.1 scores higher on 14 and o1 on 0. The widest gap is HLE, where Claude Fable 5.1 scores 65 against 7.7. Claude Fable 5.1 is the cheaper of the two on tracked API pricing ($10.00 against $15.00 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.