Mistral Devstral Medium vs GPT-5.5
Compare Mistral Devstral Medium by Mistral AI against GPT-5.5 by OpenAI, tested across 54 shared challenges.
Our Verdict
GPT-5.5
Mistral Devstral MediumRunner-up
No community votes yet. On paper, GPT-5.5 has the edge — bigger model tier, newer, bigger context window, major provider backing.
Mistral Devstral Medium is 15x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
Mistral Devstral Medium
Input
$0.40
13× cheaper
Output
$2.00
15× cheaper
GPT-5.5
Input
$5.00
Output
$30.00
Mistral Devstral Medium is cheaper on both — 13× input, 15× output
Writing DNA
Style Comparison
Similarity
44%
Mistral Devstral Medium uses 9.4x more transitions
Mistral Devstral Medium
GPT-5.5
50%Vocabulary58%
17wSentence Length18w
0.56Hedging0.74
4.5Bold2.9
5.3Lists5.1
0.00Emoji0.00
0.19Headings1.68
0.32Transitions0.03
Based on 21 + 26 text responses
Research
What we learned reading every model
FAQ
