GPT-5.1-Codex-Mini vs MiniMax M2.5
Compare GPT-5.1-Codex-Mini by OpenAI against MiniMax M2.5 by MiniMax, context windows of 400K vs 205K, tested across 53 shared challenges.
Our Verdict
GPT-5.1-Codex-Mini
MiniMax M2.5Runner-up
No community votes yet. On paper, GPT-5.1-Codex-Mini has the edge — bigger model tier, bigger context window, major provider backing.
MiniMax M2.5 is 5.0x 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
MiniMax M2.5
Input
$0.30
5.0× cheaper
Output
$1.20
5.0× cheaper
MiniMax M2.5 is cheaper on both — 5.0× input, 5.0× output
Writing DNA
Style Comparison
Similarity
38%
MiniMax M2.5 uses 1.5x more emoji
GPT-5.1-Codex-Mini
MiniMax M2.5
65%Vocabulary55%
20wSentence Length25w
0.56Hedging0.58
3.3Bold6.0
3.4Lists4.4
0.00Emoji0.01
0.08Headings1.11
0.05Transitions0.16
Based on 13 + 23 text responses
Research
What we learned reading every model
FAQ
