Devstral Small and Grok‑1.5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok‑1.5 shipped 418 days before Devstral Small, so benchmark comparisons should account for the intervening progress.

Devstral Small is open weight, while Grok‑1.5 is proprietary.

Direct benchmark comparisons are unavailable — Devstral Small and Grok‑1.5 don't publish scores on any of the same benchmarks.