Z.AI: GLM 4.5 Air vs OpenAI: GPT-5.6 Sol
Compare Z.AI: GLM 4.5 Air by Zhipu AI against OpenAI: GPT-5.6 Sol by OpenAI, context windows of 128K vs 1.1M, tested across 54 shared challenges.
Our Verdict
OpenAI: GPT-5.6 Sol
Z.AI: GLM 4.5 AirRunner-up
No community votes yet. On paper, OpenAI: GPT-5.6 Sol has the edge — bigger model tier, newer, bigger context window.
Z.AI: GLM 4.5 Air is 27x 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
25× cheaper
Output
$1.10
27× cheaper
OpenAI: GPT-5.6 Sol
Input
$5.00
Output
$30.00
Z.AI: GLM 4.5 Air is cheaper on both — 25× input, 27× output
Writing DNA
Style Comparison
Similarity
48%
Z.AI: GLM 4.5 Air uses 3.0x more emoji
Z.AI: GLM 4.5 Air
OpenAI: GPT-5.6 Sol
48%Vocabulary63%
16wSentence Length15w
0.40Hedging0.79
5.4Bold3.4
4.8Lists3.8
0.10Emoji0.03
0.75Headings0.95
0.12Transitions0.08
Based on 15 + 27 text responses
Research
What we learned reading every model
FAQ
