GLM 4.5vsGPT-5.1-Codex
GLM 4.5 is cheaper than GPT-5.1-Codex at $0.6/M vs $1.25/M input tokens.
| Spec | GLM 4.5 | GPT-5.1-Codex |
|---|---|---|
| Input price | $0.6/M tokens | $1.25/M tokens |
| Output price | $2.2/M tokens | $10/M tokens |
| Context window | 128K tokens | 400K tokens |
| Released | Jul 2025 | Nov 2025 |
| SWE-bench Verified | 64.2% | 73.7% |
Our Verdict
GPT-5.1-Codex
GLM 4.5Runner-up
Not enough votes to call it. On the specs, GPT-5.1-Codex has the edge: bigger model tier, newer, bigger context window.
GLM 4.5 costs 4.5x less per token.
Slight edge
API pricing
Cost per 1M tokens
GLM 4.5
Input
$0.60
2.1× cheaper
Output
$2.20
4.5× cheaper
GPT-5.1-Codex
Input
$1.25
Output
$10.00
GLM 4.5 is cheaper on both — 2.1× input, 4.5× output
Writing DNA
Style Comparison
Similarity
41%
GLM 4.5 uses 13.1x more emoji
GLM 4.5
GPT-5.1-Codex
52%Vocabulary70%
14wSentence Length17w
0.49Hedging0.39
5.5Bold3.4
4.9Lists3.5
0.13Emoji0.00
0.68Headings0.50
0.20Transitions0.38
Based on 21 + 14 text responses
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