Gemini 3.5 Flash vs Z.ai: GLM 5.1
Compare Gemini 3.5 Flash by Google AI against Z.ai: GLM 5.1 by Z-ai, in 3 community votes, z.ai: glm 5.1 wins 67% of head-to-head duels, context windows of 1.0M vs 203K, tested across 53 shared challenges.
Web Design: Gemini 3.5 Flash and Z.ai: GLM 5.1 are tied
Our Verdict
Z.ai: GLM 5.1Winner
Gemini 3.5 FlashRunner-up
Pick Z.ai: GLM 5.1. In 3 blind votes, Z.ai: GLM 5.1 wins 67% of the time. That's not luck.
Clear winner
API pricing
Cost per 1M tokens
Gemini 3.5 Flash
Input
$1.50
Output
$9.00
Z.ai: GLM 5.1
Input
$1.40
1.1× cheaper
Output
$4.40
2.0× cheaper
Z.ai: GLM 5.1 is cheaper on both — 1.1× input, 2.0× output
Writing DNA
Style Comparison
Similarity
61%
Gemini 3.5 Flash uses 2.0x more headings
Gemini 3.5 Flash
Z.ai: GLM 5.1
59%Vocabulary54%
18wSentence Length18w
0.16Hedging0.31
4.4Bold3.6
3.0Lists2.6
0.00Emoji0.00
0.89Headings0.43
0.11Transitions0.11
Based on 27 + 27 text responses
Research
What we learned reading every model
FAQ
