Claude Opus 4 vs Z.AI: GLM 4.6
Compare Claude Opus 4 by Anthropic against Z.AI: GLM 4.6 by Zhipu AI, context windows of 200K vs 203K, tested across 53 shared challenges.
Our Verdict
Claude Opus 4
Z.AI: GLM 4.6
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Z.AI: GLM 4.6 is 43x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Claude Opus 4
Input
$15.00
Output
$75.00
Z.AI: GLM 4.6
Input
$0.40
38× cheaper
Output
$1.75
43× cheaper
Z.AI: GLM 4.6 is cheaper on both — 38× input, 43× output
Writing DNA
Style Comparison
Similarity
44%
Claude Opus 4 uses 4.4x more sentence length
Claude Opus 4
Z.AI: GLM 4.6
64%Vocabulary52%
62wSentence Length14w
0.52Hedging0.29
4.4Bold5.2
9.1Lists3.2
0.11Emoji0.18
1.87Headings0.57
0.27Transitions0.09
Based on 16 + 22 text responses
Research
What we learned reading every model
FAQ
