GLM 5 Turbo vs GPT-5.4 Pro
Compare GLM 5 Turbo by Z-ai against GPT-5.4 Pro by OpenAI, context windows of 203K vs 1.1M, tested across 18 shared challenges.
Our Verdict
GPT-5.4 Pro
GLM 5 TurboRunner-up
No community votes yet. On paper, GPT-5.4 Pro has the edge — bigger model tier, bigger context window, major provider backing.
GLM 5 Turbo is 56x cheaper per token — worth considering if cost matters.
Slight edge
API pricing
Cost per 1M tokens
GLM 5 Turbo
Input
$0.96
31× cheaper
Output
$3.20
56× cheaper
GPT-5.4 Pro
Input
$30.00
Output
$180.00
GLM 5 Turbo is cheaper on both — 31× input, 56× output
Writing DNA
Style Comparison
Similarity
40%
GLM 5 Turbo uses 16.7x more transitions
GLM 5 Turbo
GPT-5.4 Pro
54%Vocabulary50%
18wSentence Length35w
0.24Hedging0.70
4.0Bold7.5
3.0Lists8.3
0.00Emoji0.00
0.72Headings2.52
0.17Transitions0.01
Based on 23 + 12 text responses
Research
What we learned reading every model
FAQ
