Claude 3.7 Sonnet vs Devstral 2 (123B)
Anthropic Claude 3.7 Sonnet | Mistral Devstral 2 (123B) | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Mistral |
| Release date | Feb 24 2025 | Dec 9 2025 |
| Access | Proprietary | Open Weight |
| 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. | 49% | — |
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. | 62.3% | — |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 68% | — |
| Timeline | ||
| Release gap | Claude 3.7 Sonnet shipped 288 days before Devstral 2 (123B) | |
Which is better: Claude 3.7 Sonnet or Devstral 2 (123B)?
Claude 3.7 Sonnet and Devstral 2 (123B) don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 3.7 Sonnet shipped 288 days before Devstral 2 (123B), so benchmark comparisons should account for the intervening progress.
Claude 3.7 Sonnet is proprietary, while Devstral 2 (123B) is open weight.
Direct benchmark comparisons are unavailable — Claude 3.7 Sonnet and Devstral 2 (123B) don't publish scores on any of the same benchmarks.
Frequently asked questions
Claude 3.7 Sonnet was released by Anthropic on Feb 24 2025.
Devstral 2 (123B) was released by Mistral on Dec 9 2025.
Claude 3.7 Sonnet is a proprietary model released by Anthropic. Devstral 2 (123B) is an open weight model released by Mistral.
Other comparisons
Claude 3.7 Sonnet vs GPT-5.6 SolDevstral 2 (123B) vs GPT-5.6 SolClaude 3.7 Sonnet vs Gemini OmniDevstral 2 (123B) vs Gemini OmniClaude 3.7 Sonnet vs Muse Spark 1.1Devstral 2 (123B) vs Muse Spark 1.1Claude 3.7 Sonnet vs Grok 4.5Devstral 2 (123B) vs Grok 4.5Claude 3.7 Sonnet vs DeepSeek-V4-ProDevstral 2 (123B) vs DeepSeek-V4-ProClaude 3.7 Sonnet vs Kimi K2.7 CodeDevstral 2 (123B) vs Kimi K2.7 Code