Z.AI: GLM 4.5 vs GPT OSS 120B
Compare Z.AI: GLM 4.5 by Zhipu AI against GPT OSS 120B by OpenAI, in 33 community votes, z.ai: glm 4.5 wins 71% of head-to-head duels, context windows of 128K vs 131K, tested across 54 shared challenges.
Web Design: Z.AI: GLM 4.5 wins 86% of votes
Image Generation: Z.AI: GLM 4.5 wins 100% of votes
Reasoning: GPT OSS 120B wins 100% of votes
Our Verdict
Z.AI: GLM 4.5Winner
GPT OSS 120BRunner-up
Pick Z.AI: GLM 4.5. In 33 blind votes, Z.AI: GLM 4.5 wins 71% of the time. That's not luck.
Pick Z.AI: GLM 4.5 for Image Generation, Web Design. Pick GPT OSS 120B for Reasoning.
Clear winner
API pricing
Cost per 1M tokens
Z.AI: GLM 4.5
Input
$0.60
Output
$2.20
GPT OSS 120B
Input
$0.18
3.3× cheaper
Output
$0.80
2.8× cheaper
GPT OSS 120B is cheaper on both — 3.3× input, 2.8× output
Writing DNA
Style Comparison
Similarity
67%
Z.AI: GLM 4.5 uses 2.7x more lists
Z.AI: GLM 4.5
GPT OSS 120B
52%Vocabulary52%
14wSentence Length19w
0.49Hedging0.28
5.5Bold7.4
4.9Lists1.8
0.13Emoji0.15
0.68Headings0.73
0.20Transitions0.17
Based on 21 + 21 text responses
Research
What we learned reading every model
FAQ
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