xAI: Grok 4.5 vs MoonshotAI: Kimi K2 0905
Compare xAI: Grok 4.5 by xAI against MoonshotAI: Kimi K2 0905 by Moonshot AI, context windows of 500K vs 262K, tested across 54 shared challenges.
Our Verdict
xAI: Grok 4.5
MoonshotAI: Kimi K2 0905
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
MoonshotAI: Kimi K2 0905
Input
$0.60
3.3× cheaper
Output
$2.50
2.4× cheaper
MoonshotAI: Kimi K2 0905 is cheaper on both — 3.3× input, 2.4× output
Writing DNA
Style Comparison
Similarity
66%
MoonshotAI: Kimi K2 0905 uses 1.7x more headings
xAI: Grok 4.5
MoonshotAI: Kimi K2 0905
61%Vocabulary62%
16wSentence Length19w
0.23Hedging0.17
2.5Bold3.3
2.4Lists3.4
0.09Emoji0.15
0.48Headings0.83
0.06Transitions0.06
Based on 27 + 22 text responses
Research
What we learned reading every model
FAQ
