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GLM 4.7 Flash vs GPT-5 Codex

Compare GLM 4.7 Flash by Zhipu AI against GPT-5 Codex by OpenAI, tested across 49 shared challenges. Updated April 2026.

Which is better, GLM 4.7 Flash or GPT-5 Codex?

GLM 4.7 Flash and GPT-5 Codex are both competitive models. Compare their real outputs side by side below.

Key Differences Between GLM 4.7 Flash and GPT-5 Codex

GLM 4.7 Flash is made by zhipu while GPT-5 Codex is from openai.

Our Verdict
GLM 4.7 Flash
GLM 4.7 Flash
GPT-5 Codex
GPT-5 Codex

No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.

Too close to call
Writing DNA

Style Comparison

Similarity
94%

GPT-5 Codex uses 14.6x more emoji

GLM 4.7 Flash
GPT-5 Codex
52%Vocabulary64%
15wSentence Length17w
0.33Hedging0.38
5.8Bold2.3
4.7Lists3.5
0.00Emoji0.15
0.68Headings0.49
0.13Transitions0.05
Based on 19 + 13 text responses
vs

Ask them anything yourself

GLM 4.7 FlashGPT-5 Codex

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
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