Claude Opus 4.1
Nothing here. The model returned empty. We stared at it for a while.
Claude Opus 4.1 vs Z.ai: GLM 5
Compare Claude Opus 4.1 by Anthropic against Z.ai: GLM 5 by Zhipu AI, context windows of 200K vs 203K, tested across 27 shared challenges. Updated April 2026.
Which is better, Claude Opus 4.1 or Z.ai: GLM 5?
Claude Opus 4.1 and Z.ai: GLM 5 are both competitive models. Claude Opus 4.1 costs $15/M input tokens vs $0.8/M for Z.ai: GLM 5. Context windows: 200K vs 203K tokens. Compare their real outputs side by side below.
Key Differences Between Claude Opus 4.1 and Z.ai: GLM 5
Claude Opus 4.1 is made by anthropic while Z.ai: GLM 5 is from zhipu. Claude Opus 4.1 has a 200K token context window compared to Z.ai: GLM 5's 203K. On pricing, Claude Opus 4.1 costs $15/M input tokens vs $0.8/M for Z.ai: GLM 5.
Our Verdict
Claude Opus 4.1
Z.ai: GLM 5
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
Z.ai: GLM 5 is 29x cheaper per token — worth considering if cost matters.
Too close to call
Writing DNA
Style Comparison
Similarity
97%
Claude Opus 4.1 uses 38.4x more emoji
Claude Opus 4.1
Z.ai: GLM 5
61%Vocabulary54%
87wSentence Length17w
0.54Hedging0.37
5.1Bold6.3
6.7Lists4.7
0.38Emoji0.00
1.68Headings0.60
0.13Transitions0.18
Based on 17 + 22 text responses
vsAsk them anything yourself
279 AI models invented the same fake scientist.
We read every word. 250 models. 2.14 million words. This is what we found.
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