GLM 5vsGPT-5.3-Codex
GLM 5 is cheaper than GPT-5.3-Codex at $0.8/M vs $1.75/M input tokens.
| Spec | GLM 5 | GPT-5.3-Codex |
|---|---|---|
| Input price | $0.8/M tokens | $1.75/M tokens |
| Output price | $2.56/M tokens | $14/M tokens |
| Context window | 203K tokens | 400K tokens |
| Weights | Open | Closed |
| Free API (OpenRouter) | No | No |
| Released | Feb 2026 | Feb 2026 |
Our Verdict
GLM 5
GPT-5.3-Codex
Not enough votes to call it. On the specs, nothing separates them.
GLM 5 costs 5.5x less per token.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
GLM 5
Input
$0.80
2.2× cheaper
Output
$2.56
5.5× cheaper
GPT-5.3-Codex
Input
$1.75
Output
$14.00
GLM 5 is cheaper on both: 2.2× input, 5.5× output.
Where to run it
10 hosts, cheapest first
Per million tokens. Prices and uptime via OpenRouter, checked 13 Sep 2026.
Writing DNA
Style Comparison
Similarity
42%
GPT-5.3-Codex uses 15.8x more emoji
GLM 5
GPT-5.3-Codex
54%Vocabulary65%
17wSentence Length23w
0.37Hedging0.51
6.3Bold6.5
4.7Lists6.2
0.00Emoji0.16
0.60Headings1.90
0.18Transitions0.03
Based on 22 + 23 text responses
Research
What we learned reading every model
FAQ
Common questions
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