Z.ai: GLM 5 vs GPT-5.4
Compare Z.ai: GLM 5 by Zhipu AI against GPT-5.4 by OpenAI, context windows of 203K vs 1.1M, tested across 53 shared challenges.
Our Verdict
Z.ai: GLM 5
GPT-5.4
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 5 is 5.9x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
Z.ai: GLM 5
Input
$0.80
3.1× cheaper
Output
$2.56
5.9× cheaper
GPT-5.4
Input
$2.50
Output
$15.00
Z.ai: GLM 5 is cheaper on both — 3.1× input, 5.9× output
Writing DNA
Style Comparison
Similarity
49%
Z.ai: GLM 5 uses 9.6x more transitions
Z.ai: GLM 5
GPT-5.4
54%Vocabulary54%
17wSentence Length28w
0.37Hedging0.69
6.3Bold4.1
4.7Lists8.1
0.00Emoji0.00
0.60Headings1.84
0.18Transitions0.02
Based on 22 + 22 text responses
Research
What we learned reading every model
FAQ
