Kimi K2.5 vs OpenAI o3
Compare Kimi K2.5 by Moonshot AI against OpenAI o3 by OpenAI, tested across 53 shared challenges.
Our Verdict
OpenAI o3
Kimi K2.5Runner-up
No community votes yet. On paper, OpenAI o3 has the edge — bigger model tier, major provider backing.
Kimi K2.5 is 13x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Kimi K2.5
Input
$0.60
17× cheaper
Output
$3.00
13× cheaper
OpenAI o3
Input
$10.00
Output
$40.00
Kimi K2.5 is cheaper on both — 17× input, 13× output
Writing DNA
Style Comparison
Similarity
56%
Kimi K2.5
OpenAI o3
61%Vocabulary68%
21wSentence Length14w
0.55Hedging0.26
4.9Bold0.7
2.8Lists3.0
0.01Emoji0.00
0.56Headings0.38
0.17Transitions0.12
Based on 20 + 16 text responses
Research
What we learned reading every model
FAQ
Common questions
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