Mistral Devstral MediumvsOpenAI o3
Mistral Devstral Medium is cheaper than OpenAI o3 at $0.4/M vs $10/M input tokens.
| Spec | Mistral Devstral Medium | OpenAI o3 |
|---|---|---|
| Input price | $0.4/M tokens | $10/M tokens |
| Output price | $2/M tokens | $40/M tokens |
| Released | Jul 2025 | Apr 2025 |
| SWE-bench Verified | 61.6% | 69.1% |
Our Verdict
OpenAI o3
Mistral Devstral MediumRunner-up
Not enough votes to call it. On the specs, OpenAI o3 has the edge: bigger model tier, major provider backing.
Mistral Devstral Medium costs 20x less per token.
Too close to call
API pricing
Cost per 1M tokens
Mistral Devstral Medium
Input
$0.40
25× cheaper
Output
$2.00
20× cheaper
OpenAI o3
Input
$10.00
Output
$40.00
Mistral Devstral Medium is cheaper on both — 25× input, 20× output
Writing DNA
Style Comparison
Similarity
32%
Mistral Devstral Medium uses 7.1x more bold
Mistral Devstral Medium
OpenAI o3
50%Vocabulary70%
18wSentence Length14w
0.50Hedging0.27
4.1Bold0.6
4.8Lists2.8
0.00Emoji0.00
0.19Headings0.32
0.29Transitions0.10
Based on 27 + 19 text responses
Research
What we learned reading every model
FAQ
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