GPT-5.1-Codex-Mini vs Mistral Small 4
Compare GPT-5.1-Codex-Mini by OpenAI against Mistral Small 4 by Mistral AI, context windows of 400K vs 262K, tested across 53 shared challenges.
Our Verdict
GPT-5.1-Codex-Mini
Mistral Small 4Runner-up
No community votes yet. On paper, GPT-5.1-Codex-Mini has the edge — bigger model tier, bigger context window, major provider backing.
Mistral Small 4 is 10x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.1-Codex-Mini
Input
$1.50
Output
$6.00
Mistral Small 4
Input
$0.15
10× cheaper
Output
$0.60
10× cheaper
Mistral Small 4 is cheaper on both — 10× input, 10× output
Writing DNA
Style Comparison
Similarity
26%
Mistral Small 4 uses 19.0x more emoji
GPT-5.1-Codex-Mini
Mistral Small 4
65%Vocabulary50%
20wSentence Length18w
0.56Hedging0.58
3.3Bold9.0
3.4Lists5.6
0.00Emoji0.19
0.08Headings1.10
0.05Transitions0.12
Based on 13 + 23 text responses
Research
What we learned reading every model
FAQ
