Kimi K2 vs OpenAI o3
Compare Kimi K2 by Moonshot AI against OpenAI o3 by OpenAI, in 5 community votes, kimi k2 wins 80% of head-to-head duels, tested across 54 shared challenges.
Reasoning: Kimi K2 wins 67% of votes
Our Verdict
Kimi K2Winner
OpenAI o3Runner-up
Pick Kimi K2. In 5 blind votes, Kimi K2 wins 80% of the time. That's not luck.
Kimi K2 particularly excels in Reasoning. Kimi K2 is 17x cheaper per token — worth considering if cost matters.
Clear winner
API pricing
Cost per 1M tokens
Kimi K2
Input
$0.57
18× cheaper
Output
$2.30
17× cheaper
OpenAI o3
Input
$10.00
Output
$40.00
Kimi K2 is cheaper on both — 18× input, 17× output
Writing DNA
Style Comparison
Similarity
79%
Kimi K2 uses 68.5x more emoji
Kimi K2
OpenAI o3
63%Vocabulary68%
19wSentence Length14w
0.35Hedging0.26
4.2Bold0.7
3.6Lists3.0
0.68Emoji0.00
0.61Headings0.38
0.06Transitions0.12
Based on 22 + 16 text responses
Research
What we learned reading every model
FAQ
Common questions
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