Z.AI: GLM 4.5 vs GPT-4

Compare Z.AI: GLM 4.5 by Zhipu AI against GPT-4 by OpenAI, context windows of 128K vs 8K, tested across 19 shared challenges. Updated April 2026.

Which is better, Z.AI: GLM 4.5 or GPT-4?

Z.AI: GLM 4.5 and GPT-4 are both competitive models. Z.AI: GLM 4.5 costs $0.6/M input tokens vs $30/M for GPT-4. Context windows: 128K vs 8K tokens. Compare their real outputs side by side below.

Key Differences Between Z.AI: GLM 4.5 and GPT-4

Z.AI: GLM 4.5 is made by zhipu while GPT-4 is from openai. Z.AI: GLM 4.5 has a 128K token context window compared to GPT-4's 8K. On pricing, Z.AI: GLM 4.5 costs $0.6/M input tokens vs $30/M for GPT-4.

Our Verdict
Z.AI: GLM 4.5
Z.AI: GLM 4.5
GPT-4
GPT-4

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 4.5 is 27x cheaper per token — worth considering if cost matters.

Too close to call
Writing DNA

Style Comparison

Similarity
99%

Z.AI: GLM 4.5 uses 13.1x more emoji

Z.AI: GLM 4.5
GPT-4
52%Vocabulary59%
14wSentence Length18w
0.49Hedging1.10
5.5Bold0.8
4.9Lists2.5
0.13Emoji0.00
0.68Headings0.00
0.20Transitions0.45
Based on 21 + 15 text responses
vs

Ask them anything yourself

Z.AI: GLM 4.5GPT-4

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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