Z.AI: GLM 4.5 vs GPT-5
Compare Z.AI: GLM 4.5 by Zhipu AI against GPT-5 by OpenAI, in 19 community votes, gpt-5 wins 82% of head-to-head duels, context windows of 128K vs 400K, tested across 52 shared challenges.
Reasoning: GPT-5 wins 89% of votes
Image Generation: GPT-5 wins 75% of votes
Web Design: GPT-5 wins 67% of votes
Our Verdict
GPT-5Winner
Z.AI: GLM 4.5Runner-up
Pick GPT-5. In 19 blind votes, GPT-5 wins 82% of the time. That's not luck.
GPT-5 particularly excels in Reasoning, Image Generation, Web Design. Z.AI: GLM 4.5 is 4.5x cheaper per token — worth considering if cost matters.
Clear winner
API pricing
Cost per 1M tokens
Z.AI: GLM 4.5
Input
$0.60
2.1× cheaper
Output
$2.20
4.5× cheaper
GPT-5
Input
$1.25
Output
$10.00
Z.AI: GLM 4.5 is cheaper on both — 2.1× input, 4.5× output
Writing DNA
Style Comparison
Similarity
47%
Z.AI: GLM 4.5 uses 13.1x more emoji
Z.AI: GLM 4.5
GPT-5
52%Vocabulary65%
14wSentence Length13w
0.49Hedging0.20
5.5Bold0.2
4.9Lists4.6
0.13Emoji0.00
0.68Headings0.16
0.20Transitions0.03
Based on 21 + 16 text responses
Research
What we learned reading every model
FAQ
