Z.AI: GLM 4.5 Air vs GPT-5.2
Compare Z.AI: GLM 4.5 Air by Zhipu AI against GPT-5.2 by OpenAI, context windows of 128K vs 400K, tested across 52 shared challenges.
Our Verdict
GPT-5.2
Z.AI: GLM 4.5 AirRunner-up
No community votes yet. On paper, GPT-5.2 has the edge — bigger model tier, newer, bigger context window.
Z.AI: GLM 4.5 Air is 13x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
Z.AI: GLM 4.5 Air
Input
$0.20
8.8× cheaper
Output
$1.10
13× cheaper
GPT-5.2
Input
$1.75
Output
$14.00
Z.AI: GLM 4.5 Air is cheaper on both — 8.8× input, 13× output
Writing DNA
Style Comparison
Similarity
30%
GPT-5.2 uses 2.6x more transitions
Z.AI: GLM 4.5 Air
GPT-5.2
48%Vocabulary64%
16wSentence Length16w
0.40Hedging0.34
5.4Bold9.4
4.8Lists3.9
0.10Emoji0.06
0.75Headings0.89
0.12Transitions0.31
Based on 15 + 15 text responses
Research
What we learned reading every model
FAQ
