Across 37 shared benchmarks, Claude Fable 5.1 scores higher on 32 and Gemini 3.1 Pro on 5. The widest gap is DeepSWE 1.1, where Claude Fable 5.1 scores 67.4 against 12. Gemini 3.1 Pro is the cheaper of the two on tracked API pricing ($2.00 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, google-official), otherwise the lowest tracked offer.