GPT-4.5 vs Kimi K2.5
Compare GPT-4.5 by OpenAI against Kimi K2.5 by Moonshot AI, context windows of 128K vs 262K, tested across 24 shared challenges.
Our Verdict
GPT-4.5
Kimi K2.5
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Kimi K2.5 is 50x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GPT-4.5
Input
$75.00
Output
$150.00
Kimi K2.5
Input
$0.60
125× cheaper
Output
$3.00
50× cheaper
Kimi K2.5 is cheaper on both — 125× input, 50× output
Writing DNA
Style Comparison
Similarity
70%
GPT-4.5
Kimi K2.5
63%Vocabulary61%
16wSentence Length21w
0.57Hedging0.55
4.7Bold4.9
6.4Lists2.8
0.00Emoji0.01
1.30Headings0.56
0.54Transitions0.17
Based on 11 + 20 text responses
Research
What we learned reading every model
FAQ
Common questions
Keep exploring
