Claude Sonnet 4vsMistral Devstral Small 1.1
Mistral Devstral Small 1.1 is cheaper than Claude Sonnet 4 at $0.1/M vs $3/M input tokens.
| Spec | Claude Sonnet 4 | Mistral Devstral Small 1.1 |
|---|---|---|
| Input price | $3/M tokens | $0.1/M tokens |
| Output price | $15/M tokens | $0.3/M tokens |
| Context window | 200K tokens | — |
| Weights | Closed | Open |
| Free API (OpenRouter) | No | No |
| Released | May 2025 | Jul 2025 |
| SWE-bench Verified | 72.7% | 46.8% |
Our Verdict
Claude Sonnet 4
Mistral Devstral Small 1.1Runner-up
Not enough votes to call it. On the specs, Claude Sonnet 4 has the edge: bigger model tier, bigger context window, major provider backing.
Claude Sonnet 4 takes Web Design. Mistral Devstral Small 1.1 costs 50x less per token.
Too close to call
API pricing
Cost per 1M tokens
Claude Sonnet 4
Input
$3.00
Output
$15.00
Mistral Devstral Small 1.1
Input
$0.10
30× cheaper
Output
$0.30
50× cheaper
Mistral Devstral Small 1.1 is cheaper on both: 30× input, 50× output.
Where to run it
2 hosts
Claude Sonnet 42 hosts
Mistral Devstral Small 1.1
No hosts listed on OpenRouter.
Per million tokens. Prices and uptime via OpenRouter, checked 9 Sep 2026.
Writing DNA
Style Comparison
Similarity
45%
Claude Sonnet 4 uses 70.1x more emoji
Claude Sonnet 4
Mistral Devstral Small 1.1
64%Vocabulary51%
81wSentence Length18w
0.56Hedging0.55
4.5Bold3.8
6.6Lists5.1
0.70Emoji0.00
1.59Headings0.07
0.20Transitions0.28
Based on 28 + 27 text responses
Research
What we learned reading every model
FAQ
Common questions
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