GLM 4.5vsGPT-5.2 Pro
GLM 4.5 is cheaper than GPT-5.2 Pro at $0.6/M vs $21/M input tokens.
| Spec | GLM 4.5 | GPT-5.2 Pro |
|---|---|---|
| Input price | $0.6/M tokens | $21/M tokens |
| Output price | $2.2/M tokens | $168/M tokens |
| Context window | 128K tokens | 400K tokens |
| Weights | Open | Closed |
| Free API (OpenRouter) | No | No |
| Released | Jul 2025 | Dec 2025 |
| SWE-bench Verified | 64.2% | 80.0% |
Our Verdict
GPT-5.2 Pro
GLM 4.5Runner-up
Not enough votes to call it. On the specs, GPT-5.2 Pro has the edge: bigger model tier, newer, bigger context window.
GLM 4.5 costs 76x less per token.
Slight edge
API pricing
Cost per 1M tokens
GLM 4.5
Input
$0.60
35× cheaper
Output
$2.20
76× cheaper
GPT-5.2 Pro
Input
$21.00
Output
$168.00
GLM 4.5 is cheaper on both: 35× input, 76× output.
Where to run it
2 hosts
GLM 4.51 host
GPT-5.2 Pro1 host
Per million tokens. Prices and uptime via OpenRouter, checked 8 Sep 2026.
Writing DNA
Style Comparison
Similarity
43%
GLM 4.5 uses 33.2x more emoji
GLM 4.5
GPT-5.2 Pro
52%Vocabulary62%
17wSentence Length19w
0.52Hedging0.39
5.6Bold8.6
4.8Lists3.8
0.33Emoji0.00
0.66Headings1.17
0.17Transitions0.02
Based on 28 + 10 text responses
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