Claude Instant 1.2 and Mathstral 7B don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude Instant 1.2 shipped 342 days before Mathstral 7B, so benchmark comparisons should account for the intervening progress.

Claude Instant 1.2 is proprietary, while Mathstral 7B is open weight.

Direct benchmark comparisons are unavailable — Claude Instant 1.2 and Mathstral 7B don't publish scores on any of the same benchmarks.