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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 26 shared challenges. Updated April 2026.

Which is better, Z.AI: GLM 4.5 Air or GPT OSS 120B?

Z.AI: GLM 4.5 Air is the better choice overall, winning 86% of 91 blind community votes on Rival. Z.AI: GLM 4.5 Air costs $0.2/M input tokens vs $0.18/M for GPT OSS 120B. Context windows: 128K vs 131K tokens. Compare their real outputs side by side below.

Key Differences Between Z.AI: GLM 4.5 Air and GPT OSS 120B

Z.AI: GLM 4.5 Air is made by zhipu while GPT OSS 120B is from openai. Z.AI: GLM 4.5 Air has a 128K token context window compared to GPT OSS 120B's 131K. On pricing, Z.AI: GLM 4.5 Air costs $0.2/M input tokens vs $0.18/M for GPT OSS 120B. In community voting, In 91 community votes, Z.AI: GLM 4.5 Air wins 86% of head-to-head duels.

In 91 community votes, Z.AI: GLM 4.5 Air wins 86% of head-to-head duels. Z.AI: GLM 4.5 Air leads in Web Design, Image Generation, Conversation, while GPT OSS 120B leads in Reasoning. Based on blind community voting from the Rival open dataset of 91+ human preference judgments for this pair.

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 Air
Z.AI: GLM 4.5 AirWinner
GPT OSS 120B
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
Writing DNA

Style Comparison

Similarity
97%

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
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Z.AI: GLM 4.5 AirGPT OSS 120B

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AI Hallucination Index 2026
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