Z.ai: GLM 5.2 vs GPT-5
Compare Z.ai: GLM 5.2 by Zhipu AI against GPT-5 by OpenAI, context windows of 1.0M vs 400K, tested across 51 shared challenges.
Our Verdict
Z.ai: GLM 5.2
GPT-5Runner-up
No community votes yet. On paper, Z.ai: GLM 5.2 has the edge — newer, bigger context window.
Too close to call
API pricing
Cost per 1M tokens
Z.ai: GLM 5.2
Input
$1.40
Output
$4.40
2.3× cheaper
GPT-5
Input
$1.25
1.1× cheaper
Output
$10.00
GPT-5 wins input (1.1× cheaper)·Z.ai: GLM 5.2 wins output (2.3× cheaper)
Writing DNA
Style Comparison
Similarity
47%
Z.ai: GLM 5.2 uses 19.5x more bold
Z.ai: GLM 5.2
GPT-5
56%Vocabulary65%
18wSentence Length13w
0.27Hedging0.20
3.7Bold0.2
2.8Lists4.6
0.00Emoji0.00
0.56Headings0.16
0.24Transitions0.03
Based on 27 + 16 text responses
Research
What we learned reading every model
FAQ
