Z.AI: GLM 4.7 vs Claude Opus 4

Compare Z.AI: GLM 4.7 by OpenRouter against Claude Opus 4 by Anthropic, tested across 35 shared challenges. Updated April 2026.

Which is better, Z.AI: GLM 4.7 or Claude Opus 4?

Z.AI: GLM 4.7 and Claude Opus 4 are both competitive models. Compare their real outputs side by side below.

Key Differences Between Z.AI: GLM 4.7 and Claude Opus 4

Z.AI: GLM 4.7 is made by openrouter while Claude Opus 4 is from anthropic.

Our Verdict
Claude Opus 4
Claude Opus 4
Z.AI: GLM 4.7
Z.AI: GLM 4.7Runner-up

No community votes yet. On paper, Claude Opus 4 has the edge — bigger model tier, bigger context window, major provider backing.

Too close to call
Writing DNA

Style Comparison

Similarity
86%

Claude Opus 4 uses 4.0x more sentence length

Z.AI: GLM 4.7
Claude Opus 4
53%Vocabulary64%
16wSentence Length62w
0.28Hedging0.52
5.7Bold4.4
4.2Lists9.1
0.12Emoji0.11
0.52Headings1.87
0.08Transitions0.27
Based on 21 + 16 text responses
vs

Ask them anything yourself

Z.AI: GLM 4.7Claude Opus 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
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