Across 19 shared benchmarks, GPT-6 Astra scores higher on 19 and o4-mini on 0. The widest gap is HLE, where GPT-6 Astra scores 54.7 against 16.5. o4-mini is the cheaper of the two on tracked API pricing ($1.10 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.