Z.AI: GLM 4.5 Air vs GPT OSS 120B
Compare Z.AI: GLM 4.5 Air by Zhipu AI against GPT OSS 120B by OpenAI, in 91 community votes, z.ai: glm 4.5 air wins 86% of head-to-head duels, context windows of 128K vs 131K, tested across 53 shared challenges.
Web Design: Z.AI: GLM 4.5 Air wins 94% of votes
Image Generation: Z.AI: GLM 4.5 Air wins 100% of votes
Reasoning: GPT OSS 120B wins 56% of votes
Conversation: Z.AI: GLM 4.5 Air wins 56% of votes
Our Verdict
Z.AI: GLM 4.5 AirWinner
GPT OSS 120BRunner-up
Pick Z.AI: GLM 4.5 Air. In 91 blind votes, Z.AI: GLM 4.5 Air wins 86% of the time. That's not luck.
Pick Z.AI: GLM 4.5 Air for Image Generation, Web Design, Conversation. Pick GPT OSS 120B for Reasoning.
Clear winner
API pricing
Cost per 1M tokens
Z.AI: GLM 4.5 Air
Input
$0.20
Output
$1.10
GPT OSS 120B
Input
$0.18
1.1× cheaper
Output
$0.80
1.4× cheaper
GPT OSS 120B is cheaper on both — 1.1× input, 1.4× output
Writing DNA
Style Comparison
Similarity
58%
Z.AI: GLM 4.5 Air uses 2.6x more lists
Z.AI: GLM 4.5 Air
GPT OSS 120B
48%Vocabulary52%
16wSentence Length19w
0.40Hedging0.28
5.4Bold7.4
4.8Lists1.8
0.10Emoji0.15
0.75Headings0.73
0.12Transitions0.17
Based on 15 + 21 text responses
Research
What we learned reading every model
FAQ
