GPT-5.1 Chat vs MiMo-V2.5-Pro
Compare GPT-5.1 Chat by OpenAI against MiMo-V2.5-Pro by Xiaomi, context windows of 128K vs 1.0M, tested across 51 shared challenges.
Our Verdict
MiMo-V2.5-Pro
GPT-5.1 ChatRunner-up
No community votes yet. On paper, MiMo-V2.5-Pro has the edge — bigger model tier, newer, bigger context window.
MiMo-V2.5-Pro is 3.3x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5.1 Chat
Input
$1.25
Output
$10.00
MiMo-V2.5-Pro
Input
$1.00
1.3× cheaper
Output
$3.00
3.3× cheaper
MiMo-V2.5-Pro is cheaper on both — 1.3× input, 3.3× output
Writing DNA
Style Comparison
Similarity
43%
MiMo-V2.5-Pro uses 62.5x more emoji
GPT-5.1 Chat
MiMo-V2.5-Pro
73%Vocabulary58%
18wSentence Length22w
0.45Hedging0.61
1.1Bold5.7
2.4Lists3.1
0.00Emoji0.63
0.00Headings1.40
0.06Transitions0.02
Based on 15 + 27 text responses
Research
What we learned reading every model
FAQ
