GLM 4.5vso1
GLM 4.5 is cheaper than o1 at $0.6/M vs $15/M input tokens.
| Spec | GLM 4.5 | o1 |
|---|---|---|
| Input price | $0.6/M tokens | $15/M tokens |
| Output price | $2.2/M tokens | $60/M tokens |
| Context window | 128K tokens | 128K tokens |
| Weights | Open | Closed |
| Free API (OpenRouter) | No | No |
| Released | Jul 2025 | Dec 2024 |
| SWE-bench Verified | 64.2% | 48.9% |
Our Verdict
GLM 4.5
o1Runner-up
Not enough votes to call it. On the specs, GLM 4.5 has the edge: bigger model tier, newer.
GLM 4.5 costs 27x less per token.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
GLM 4.5
Input
$0.60
25× cheaper
Output
$2.20
27× cheaper
o1
Input
$15.00
Output
$60.00
GLM 4.5 is cheaper on both: 25× input, 27× output.
Where to run it
2 hosts
GLM 4.51 host
Per million tokens. Prices and uptime via OpenRouter, checked 11 Sep 2026.
Writing DNA
Style Comparison
Similarity
38%
GLM 4.5 uses 33.2x more emoji
GLM 4.5
o1
52%Vocabulary65%
17wSentence Length16w
0.52Hedging0.81
5.6Bold3.6
4.8Lists2.1
0.33Emoji0.00
0.66Headings0.32
0.17Transitions0.29
Based on 28 + 18 text responses
Research
What we learned reading every model
FAQ
