Kimi K2 Thinking vs OpenAI o4-mini
Compare Kimi K2 Thinking by Moonshot AI against OpenAI o4-mini by OpenAI, tested across 53 shared challenges. Updated May 2026.
Which is better, Kimi K2 Thinking or OpenAI o4-mini?
Kimi K2 Thinking and OpenAI o4-mini are both competitive models. Kimi K2 Thinking costs $0.6/M input tokens vs $1.1/M for OpenAI o4-mini. Compare their real outputs side by side below.
Key Differences Between Kimi K2 Thinking and OpenAI o4-mini
Kimi K2 Thinking is made by moonshotai while OpenAI o4-mini is from openai. On pricing, Kimi K2 Thinking costs $0.6/M input tokens vs $1.1/M for OpenAI o4-mini.
API pricing
Per 1M tokens
Kimi K2 Thinking
Input
$0.60
1.8× cheaper
Output
$2.50
1.8× cheaper
OpenAI o4-mini
Input
$1.10
Output
$4.40
Kimi K2 Thinking is cheaper on both — 1.8× input, 1.8× output
Our Verdict
Kimi K2 Thinking
OpenAI o4-miniRunner-up
No community votes yet. On paper, Kimi K2 Thinking has the edge — bigger model tier, newer, bigger context window.
Too close to call
Writing DNA
Style Comparison
Similarity
39%
Kimi K2 Thinking uses 582.4x more bold
Kimi K2 Thinking
OpenAI o4-mini
57%Vocabulary73%
26wSentence Length15w
0.36Hedging0.18
5.8Bold0.0
6.0Lists2.1
0.00Emoji0.00
0.56Headings0.00
0.06Transitions0.02
Based on 14 + 10 text responses
FAQ
