Z.AI: GLM 4.5 Air vs xAI: Grok 4
Compare Z.AI: GLM 4.5 Air by Zhipu AI against xAI: Grok 4 by xAI, in 3 community votes, z.ai: glm 4.5 air wins 67% of head-to-head duels, context windows of 128K vs 256K, tested across 53 shared challenges.
Our Verdict
Z.AI: GLM 4.5 AirWinner
xAI: Grok 4Runner-up
Pick Z.AI: GLM 4.5 Air. In 3 blind votes, Z.AI: GLM 4.5 Air wins 67% of the time. That's not luck.
Z.AI: GLM 4.5 Air is 14x cheaper per token — worth considering if cost matters.
Clear winner
API pricing
Cost per 1M tokens
Z.AI: GLM 4.5 Air
Input
$0.20
15× cheaper
Output
$1.10
14× cheaper
xAI: Grok 4
Input
$3.00
Output
$15.00
Z.AI: GLM 4.5 Air is cheaper on both — 15× input, 14× output
Writing DNA
Style Comparison
Similarity
67%
Z.AI: GLM 4.5 Air uses 2.7x more transitions
Z.AI: GLM 4.5 Air
xAI: Grok 4
48%Vocabulary53%
16wSentence Length18w
0.40Hedging0.67
5.4Bold2.7
4.8Lists2.7
0.10Emoji0.07
0.75Headings0.86
0.12Transitions0.04
Based on 15 + 21 text responses
Research
What we learned reading every model
FAQ
