Claude Sonnet 4 vs Devstral Small
Anthropic Claude Sonnet 4 | Mistral Devstral Small | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Mistral |
| Release date | May 22 2025 | May 21 2025 |
| Access | Proprietary | Open Weight |
| 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. | 30% | — |
Coding SWE-Bench VerifiedReal coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | 72.7% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 75.4% | — |
| Timeline | ||
| Release gap | Devstral Small shipped 1 days before Claude Sonnet 4 | |
Which is better: Claude Sonnet 4 or Devstral Small?
Claude Sonnet 4 and Devstral Small don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Devstral Small shipped 1 days before Claude Sonnet 4, so benchmark comparisons should account for the intervening progress.
Claude Sonnet 4 is proprietary, while Devstral Small is open weight.
Direct benchmark comparisons are unavailable — Claude Sonnet 4 and Devstral Small don't publish scores on any of the same benchmarks.
Frequently asked questions
Claude Sonnet 4 was released by Anthropic on May 22 2025.
Devstral Small was released by Mistral on May 21 2025.
Claude Sonnet 4 is a proprietary model released by Anthropic. Devstral Small is an open weight model released by Mistral.
Other comparisons
Claude Sonnet 4 vs GPT-5.6 SolDevstral Small vs GPT-5.6 SolClaude Sonnet 4 vs Gemini OmniDevstral Small vs Gemini OmniClaude Sonnet 4 vs Muse Spark 1.1Devstral Small vs Muse Spark 1.1Claude Sonnet 4 vs Grok 4.5Devstral Small vs Grok 4.5Claude Sonnet 4 vs DeepSeek-V4-ProDevstral Small vs DeepSeek-V4-ProClaude Sonnet 4 vs Kimi K2.7 CodeDevstral Small vs Kimi K2.7 Code