GLM 5.1vsGPT-4
GLM 5.1 is cheaper than GPT-4 at $1.4/M vs $30/M input tokens.
| Spec | GLM 5.1 | GPT-4 |
|---|---|---|
| Input price | $1.4/M tokens | $30/M tokens |
| Output price | $4.4/M tokens | $60/M tokens |
| Context window | 203K tokens | 8K tokens |
| Released | Apr 2026 | May 2023 |
Our Verdict
GLM 5.1
GPT-4
Not enough votes to call it. On the specs, nothing separates them.
GLM 5.1 costs 14x less per token.
Too close to call
API pricing
Cost per 1M tokens
GLM 5.1
Input
$1.40
21× cheaper
Output
$4.40
14× cheaper
GPT-4
Input
$30.00
Output
$60.00
GLM 5.1 is cheaper on both — 21× input, 14× output
Writing DNA
Style Comparison
Similarity
44%
GLM 5.1 uses 43.5x more headings
GLM 5.1
GPT-4
54%Vocabulary59%
18wSentence Length18w
0.31Hedging1.10
3.6Bold0.8
2.6Lists2.5
0.00Emoji0.00
0.43Headings0.00
0.11Transitions0.45
Based on 27 + 15 text responses
Research
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