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Specifications
ParametersThe learned values that shape how a model responds. B means billion and T means trillion. For mixture-of-experts models, the total count is larger than the number active for each token. Parameter count alone does not measure quality.
24B—
Context windowHow much information the model can work with in one request, measured in tokens — pieces of words or other data. This includes your question, attachments, conversation and reply. Limits can vary by model variant and provider.
128k2M
These models have no shared benchmark scores.
Overview
CompanyMistralSpaceXSI
Release dateMay 21 2025Sep 19 2025
AccessOpen WeightClosed
Model detailsView modelView model

Frequently asked questions

Devstral Small and Grok 4 Fast don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Devstral Small shipped 121 days before Grok 4 Fast, so benchmark comparisons should account for the intervening progress.

Context windows are 128k (Devstral Small) vs 2M (Grok 4 Fast). Devstral Small is open weight, while Grok 4 Fast is closed.

Direct benchmark comparisons are unavailable — Devstral Small and Grok 4 Fast don't publish scores on any of the same benchmarks.