Z.ai: GLM 5.1 vs Kimi K2.5
Compare Z.ai: GLM 5.1 by Z-ai against Kimi K2.5 by Moonshot AI, context windows of 203K vs 262K, tested across 53 shared challenges.
Our Verdict
Z.ai: GLM 5.1
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.
Too close to call
API pricing
Cost per 1M tokens
Z.ai: GLM 5.1
Input
$1.40
Output
$4.40
Kimi K2.5
Input
$0.60
2.3× cheaper
Output
$3.00
1.5× cheaper
Kimi K2.5 is cheaper on both — 2.3× input, 1.5× output
Writing DNA
Style Comparison
Similarity
55%
Z.ai: GLM 5.1
Kimi K2.5
54%Vocabulary61%
18wSentence Length21w
0.31Hedging0.55
3.6Bold4.9
2.6Lists2.8
0.00Emoji0.01
0.43Headings0.56
0.11Transitions0.17
Based on 27 + 20 text responses
Research
What we learned reading every model
FAQ
Common questions
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