Z.AI: GLM 4.6 vs Z.ai: GLM 5.1
Compare Z.AI: GLM 4.6 by Zhipu AI against Z.ai: GLM 5.1 by Z-ai, context windows of 203K vs 203K, tested across 53 shared challenges.
Our Verdict
Z.AI: GLM 4.6
Z.ai: GLM 5.1Runner-up
No community votes yet. On paper, Z.AI: GLM 4.6 has the edge — bigger model tier, major provider backing.
Too close to call
API pricing
Cost per 1M tokens
Z.AI: GLM 4.6
Input
$0.40
3.5× cheaper
Output
$1.75
2.5× cheaper
Z.ai: GLM 5.1
Input
$1.40
Output
$4.40
Z.AI: GLM 4.6 is cheaper on both — 3.5× input, 2.5× output
Writing DNA
Style Comparison
Similarity
63%
Z.AI: GLM 4.6 uses 17.9x more emoji
Z.AI: GLM 4.6
Z.ai: GLM 5.1
52%Vocabulary54%
14wSentence Length18w
0.29Hedging0.31
5.2Bold3.6
3.2Lists2.6
0.18Emoji0.00
0.57Headings0.43
0.09Transitions0.11
Based on 22 + 27 text responses
Research
What we learned reading every model
FAQ
