Across 31 shared benchmarks, Gemini 3.1 Pro scores higher on 5 and GPT-6 Astra on 26. The widest gap is DeepSWE 1.1, where GPT-6 Astra scores 74.1 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 (google-official, direct), otherwise the lowest tracked offer.