Claude Sonnet 4 vs MoonshotAI: Kimi K2 0905
Compare Claude Sonnet 4 by Anthropic against MoonshotAI: Kimi K2 0905 by Moonshot AI, context windows of 200K vs 262K, tested across 54 shared challenges.
Our Verdict
MoonshotAI: Kimi K2 0905
Claude Sonnet 4Runner-up
No community votes yet. On paper, MoonshotAI: Kimi K2 0905 has the edge — bigger model tier, newer.
MoonshotAI: Kimi K2 0905 is 6.0x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude Sonnet 4
Input
$3.00
Output
$15.00
MoonshotAI: Kimi K2 0905
Input
$0.60
5.0× cheaper
Output
$2.50
6.0× cheaper
MoonshotAI: Kimi K2 0905 is cheaper on both — 5.0× input, 6.0× output
Writing DNA
Style Comparison
Similarity
49%
Claude Sonnet 4 uses 6.0x more emoji
Claude Sonnet 4
MoonshotAI: Kimi K2 0905
62%Vocabulary62%
111wSentence Length19w
0.40Hedging0.17
5.0Bold3.3
9.3Lists3.4
0.88Emoji0.15
2.16Headings0.83
0.33Transitions0.06
Based on 17 + 22 text responses
Research
What we learned reading every model
FAQ
