GPT-5 Pro vs Kimi K2 Thinking
Compare GPT-5 Pro by OpenAI against Kimi K2 Thinking by Moonshot AI, context windows of 400K vs 262K, tested across 41 shared challenges.
Our Verdict
GPT-5 Pro
Kimi K2 Thinking
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 48x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-5 Pro
Input
$15.00
Output
$120.00
Kimi K2 Thinking
Input
$0.60
25× cheaper
Output
$2.50
48× cheaper
Kimi K2 Thinking is cheaper on both — 25× input, 48× output
Writing DNA
Style Comparison
Similarity
43%
Kimi K2 Thinking uses 582.4x more bold
GPT-5 Pro
Kimi K2 Thinking
65%Vocabulary57%
15wSentence Length26w
0.32Hedging0.36
0.0Bold5.8
2.9Lists6.0
0.00Emoji0.00
0.00Headings0.56
0.01Transitions0.06
Based on 11 + 14 text responses
Research
What we learned reading every model
FAQ
Common questions
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