Z.AI: GLM 4.5 vs xAI: Grok 4
Compare Z.AI: GLM 4.5 by Zhipu AI against xAI: Grok 4 by xAI, in 28 community votes, z.ai: glm 4.5 wins 64% of head-to-head duels, context windows of 128K vs 256K, tested across 53 shared challenges.
Web Design: Z.AI: GLM 4.5 wins 75% of votes
Reasoning: xAI: Grok 4 wins 60% of votes
Conversation: Z.AI: GLM 4.5 and xAI: Grok 4 are tied
Image Generation: Z.AI: GLM 4.5 and xAI: Grok 4 are tied
Our Verdict
Z.AI: GLM 4.5Winner
xAI: Grok 4Runner-up
Pick Z.AI: GLM 4.5. In 28 blind votes, Z.AI: GLM 4.5 wins 64% of the time. That's not luck.
Pick Z.AI: GLM 4.5 for Web Design. Pick xAI: Grok 4 for Reasoning. Z.AI: GLM 4.5 is 6.8x cheaper per token — worth considering if cost matters.
Clear winner
API pricing
Cost per 1M tokens
Z.AI: GLM 4.5
Input
$0.60
5.0× cheaper
Output
$2.20
6.8× cheaper
xAI: Grok 4
Input
$3.00
Output
$15.00
Z.AI: GLM 4.5 is cheaper on both — 5.0× input, 6.8× output
Writing DNA
Style Comparison
Similarity
76%
Z.AI: GLM 4.5 uses 4.6x more transitions
Z.AI: GLM 4.5
xAI: Grok 4
52%Vocabulary53%
14wSentence Length18w
0.49Hedging0.67
5.5Bold2.7
4.9Lists2.7
0.13Emoji0.07
0.68Headings0.86
0.20Transitions0.04
Based on 21 + 21 text responses
Research
What we learned reading every model
FAQ
