Kimi K2 Thinking vs OpenAI o3
Compare Kimi K2 Thinking by Moonshot AI against OpenAI o3 by OpenAI, tested across 53 shared challenges.
Our Verdict
Kimi K2 Thinking
OpenAI o3
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Kimi K2 Thinking is 16x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Kimi K2 Thinking
Input
$0.60
17× cheaper
Output
$2.50
16× cheaper
OpenAI o3
Input
$10.00
Output
$40.00
Kimi K2 Thinking is cheaper on both — 17× input, 16× output
Writing DNA
Style Comparison
Similarity
43%
Kimi K2 Thinking uses 8.4x more bold
Kimi K2 Thinking
OpenAI o3
57%Vocabulary68%
26wSentence Length14w
0.36Hedging0.26
5.8Bold0.7
6.0Lists3.0
0.00Emoji0.00
0.56Headings0.38
0.06Transitions0.12
Based on 14 + 16 text responses
Research
What we learned reading every model
FAQ
