Devstral Small vs Grok 4.20 Beta
Mistral Devstral Small | SpaceXAI Grok 4.20 Beta | |
|---|---|---|
| Overview | ||
| Company | Mistral | SpaceXAI |
| Release date | May 21 2025 | Feb 17 2026 |
| 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. | — | 56% |
Abstract reasoning ARC-AGI-2Puzzle-style tests of abstract reasoning and pattern-finding — the kind of thing people find easy but AIs often struggle with. Higher is better. | — | 53.3% |
Community preference Arena Elo (Text)Real people chat with two anonymous AIs side by side and vote for the answer they prefer. Votes become a chess-style Elo rating on arena.ai — it measures which AI people actually like, not test scores. Higher is better. | — | 1475 |
| Timeline | ||
| Release gap | Devstral Small shipped 272 days before Grok 4.20 Beta | |
Which is better: Devstral Small or Grok 4.20 Beta?
Devstral Small and Grok 4.20 Beta don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Devstral Small shipped 272 days before Grok 4.20 Beta, so benchmark comparisons should account for the intervening progress.
Devstral Small is open weight, while Grok 4.20 Beta is proprietary.
Direct benchmark comparisons are unavailable — Devstral Small and Grok 4.20 Beta don't publish scores on any of the same benchmarks.
Frequently asked questions
Devstral Small was released by Mistral on May 21 2025.
Grok 4.20 Beta was released by SpaceXAI on Feb 17 2026.
Devstral Small is an open weight model released by Mistral. Grok 4.20 Beta is a proprietary model released by SpaceXAI.
Other comparisons
Devstral Small vs Claude Sonnet 5Grok 4.20 Beta vs Claude Sonnet 5Devstral Small vs GPT-5.6 SolGrok 4.20 Beta vs GPT-5.6 SolDevstral Small vs Gemini OmniGrok 4.20 Beta vs Gemini OmniDevstral Small vs Muse Spark 1.1Grok 4.20 Beta vs Muse Spark 1.1Devstral Small vs DeepSeek-V4-ProGrok 4.20 Beta vs DeepSeek-V4-ProDevstral Small vs Kimi K2.7 CodeGrok 4.20 Beta vs Kimi K2.7 Code