Ministral 3 3B-25-12 and GPT-5 nano don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. GPT-5 nano shipped 117 days before Ministral 3 3B-25-12, so benchmark comparisons should account for the intervening progress.

Ministral 3 3B-25-12 is open weight, while GPT-5 nano is proprietary.

Direct benchmark comparisons are unavailable — Ministral 3 3B-25-12 and GPT-5 nano don't publish scores on any of the same benchmarks.