Z.ai: GLM 5.2 vs xAI: Grok 4 Fast (free)
Compare Z.ai: GLM 5.2 by Zhipu AI against xAI: Grok 4 Fast (free) by xAI, context windows of 1.0M vs 2.0M, tested across 34 shared challenges.
Our Verdict
Z.ai: GLM 5.2
xAI: Grok 4 Fast (free)Runner-up
No community votes yet. On paper, Z.ai: GLM 5.2 has the edge — bigger model tier, newer.
Too close to call
API pricing
Cost per 1M tokens
Z.ai: GLM 5.2
Input
$1.40
Output
$4.40
xAI: Grok 4 Fast (free)
Input
$0.000
Output
$0.000
Writing DNA
Style Comparison
Similarity
60%
xAI: Grok 4 Fast (free) uses 2.8x more headings
Z.ai: GLM 5.2
xAI: Grok 4 Fast (free)
56%Vocabulary65%
18wSentence Length13w
0.27Hedging0.56
3.7Bold1.4
2.8Lists2.5
0.00Emoji0.00
0.56Headings1.58
0.24Transitions0.28
Based on 27 + 14 text responses
Research
What we learned reading every model
FAQ
