Z.AI: GLM 4.5 Air vs Claude Sonnet 4

Compare Z.AI: GLM 4.5 Air by Zhipu AI against Claude Sonnet 4 by Anthropic, in 17 community votes, z.ai: glm 4.5 air and claude sonnet 4 are closely matched, context windows of 128K vs 200K, tested across 20 shared challenges. Updated April 2026.

Which is better, Z.AI: GLM 4.5 Air or Claude Sonnet 4?

Z.AI: GLM 4.5 Air and Claude Sonnet 4 are closely matched based on 17 community votes. Z.AI: GLM 4.5 Air costs $0.2/M input tokens vs $3/M for Claude Sonnet 4. Context windows: 128K vs 200K tokens. Compare their real outputs side by side below.

Key Differences Between Z.AI: GLM 4.5 Air and Claude Sonnet 4

Z.AI: GLM 4.5 Air is made by zhipu while Claude Sonnet 4 is from anthropic. Z.AI: GLM 4.5 Air has a 128K token context window compared to Claude Sonnet 4's 200K. On pricing, Z.AI: GLM 4.5 Air costs $0.2/M input tokens vs $3/M for Claude Sonnet 4. In community voting, In 17 community votes, Z.AI: GLM 4.5 Air and Claude Sonnet 4 are closely matched.

In 17 community votes, Z.AI: GLM 4.5 Air and Claude Sonnet 4 are closely matched. Z.AI: GLM 4.5 Air leads in Image Generation, Web Design, while Claude Sonnet 4 leads in Reasoning. Based on blind community voting from the Rival open dataset of 17+ human preference judgments for this pair.

Image Generation: Z.AI: GLM 4.5 Air wins 83% of votes
Web Design: Z.AI: GLM 4.5 Air wins 60% of votes
Reasoning: Claude Sonnet 4 wins 100% of votes
Our Verdict
Z.AI: GLM 4.5 Air
Z.AI: GLM 4.5 Air
Claude Sonnet 4
Claude Sonnet 4

Too close to call. Pick based on your use case.

Pick Z.AI: GLM 4.5 Air for Image Generation, Web Design. Pick Claude Sonnet 4 for Reasoning. Z.AI: GLM 4.5 Air is 14x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
89%

Claude Sonnet 4 uses 8.9x more emoji

Z.AI: GLM 4.5 Air
Claude Sonnet 4
48%Vocabulary62%
16wSentence Length111w
0.40Hedging0.40
5.4Bold5.0
4.8Lists9.3
0.10Emoji0.88
0.75Headings2.16
0.12Transitions0.33
Based on 15 + 17 text responses
vs

Ask them anything yourself

Z.AI: GLM 4.5 AirClaude Sonnet 4

279 AI models invented the same fake scientist.

We read every word. 250 models. 2.14 million words. This is what we found.

AI Hallucination Index 2026
Free preview13 of 58 slides
FAQ

Common questions