GLM 5 Turbo vs GPT-4.5
Compare GLM 5 Turbo by Z-ai against GPT-4.5 by OpenAI, context windows of 203K vs 128K, tested across 24 shared challenges.
Our Verdict
GLM 5 Turbo
GPT-4.5
No community votes yet. On paper, these are closely matched - try both with your actual task to see which fits your workflow.
GLM 5 Turbo is 47x cheaper per token — worth considering if cost matters.
Too close to call
API pricing
Cost per 1M tokens
GLM 5 Turbo
Input
$0.96
78× cheaper
Output
$3.20
47× cheaper
GPT-4.5
Input
$75.00
Output
$150.00
GLM 5 Turbo is cheaper on both — 78× input, 47× output
Writing DNA
Style Comparison
Similarity
38%
GPT-4.5 uses 3.2x more transitions
GLM 5 Turbo
GPT-4.5
54%Vocabulary63%
18wSentence Length16w
0.24Hedging0.57
4.0Bold4.7
3.0Lists6.4
0.00Emoji0.00
0.72Headings1.30
0.17Transitions0.54
Based on 23 + 11 text responses
Research
What we learned reading every model
FAQ
Common questions
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