Devstral Small vs Grok 4.1 Fast
Mistral Devstral Small | SpaceXAI Grok 4.1 Fast | |
|---|---|---|
| Overview | ||
| Company | Mistral | SpaceXAI |
| Release date | May 21 2025 | Nov 19 2025 |
| Access | Open Weight | Proprietary |
| Specifications | ||
Parameters | 24B | — |
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | — | 19% |
| Timeline | ||
| Release gap | Devstral Small shipped 182 days before Grok 4.1 Fast | |
Which is better: Devstral Small or Grok 4.1 Fast?
Devstral Small and Grok 4.1 Fast don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Devstral Small shipped 182 days before Grok 4.1 Fast, so benchmark comparisons should account for the intervening progress.
Devstral Small is open weight, while Grok 4.1 Fast is proprietary.
Direct benchmark comparisons are unavailable — Devstral Small and Grok 4.1 Fast don't publish scores on any of the same benchmarks.
Frequently asked questions
Devstral Small was released by Mistral on May 21 2025.
Grok 4.1 Fast was released by SpaceXAI on Nov 19 2025.
Devstral Small is an open weight model released by Mistral. Grok 4.1 Fast is a proprietary model released by SpaceXAI.
Other comparisons
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