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  5. Devstral 2 2512vsOpenAI o3
Updated Dec 2025

Devstral 2 2512vsOpenAI o3

Devstral 2 2512 is the newer model, released after OpenAI o3.

Devstral 2 2512 and OpenAI o3 compared across 35 shared prompts
SpecDevstral 2 2512OpenAI o3
Input price—$10/M tokens
Output price—$40/M tokens
WeightsOpenClosed
Free API (OpenRouter)NoNo
ReleasedDec 2025Apr 2025
Our Verdict
Devstral 2 2512
Devstral 2 2512
OpenAI o3
OpenAI o3

Not enough votes to call it. On the specs, nothing separates them.

Too close to call
API pricing

Cost per 1M tokens

Devstral 2 2512
Input
—
Output
—
OpenAI o3
Input
$10.00
Output
$40.00
Where to run it

2 hosts

Devstral 2 25121 host
HostInOutContextUptime
Mistral$0.40 in·$2.00 out·262k·100% up
OpenAI o31 host
HostInOutContextUptime
OpenAI$2.00 in·$8.00 out·200k·100% up

Per million tokens. Prices and uptime via OpenRouter, checked 8 Sep 2026.

Writing DNA

Style Comparison

Similarity
29%

Devstral 2 2512 uses 30.7x more emoji

Devstral 2 2512
OpenAI o3
56%Vocabulary70%
14wSentence Length14w
0.51Hedging0.27
8.8Bold0.6
5.3Lists2.8
0.31Emoji0.00
1.11Headings0.32
0.18Transitions0.10
Based on 14 + 19 text responses
Research

What we learned reading every model

FAQ

Common questions

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