xAI: Grok 4.5 vs Kimi K2 Thinking
Compare xAI: Grok 4.5 by xAI against Kimi K2 Thinking by Moonshot AI, context windows of 500K vs 262K, tested across 54 shared challenges.
Our Verdict
xAI: Grok 4.5
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.
Too close to call
API pricing
Cost per 1M tokens
xAI: Grok 4.5
Input
$2.00
Output
$6.00
Kimi K2 Thinking
Input
$0.60
3.3× cheaper
Output
$2.50
2.4× cheaper
Kimi K2 Thinking is cheaper on both — 3.3× input, 2.4× output
Writing DNA
Style Comparison
Similarity
39%
xAI: Grok 4.5 uses 9.0x more emoji
xAI: Grok 4.5
Kimi K2 Thinking
61%Vocabulary57%
16wSentence Length26w
0.23Hedging0.36
2.5Bold5.8
2.4Lists6.0
0.09Emoji0.00
0.48Headings0.56
0.06Transitions0.06
Based on 27 + 14 text responses
Research
What we learned reading every model
FAQ
