GLM 5vsGPT-5 Pro
GLM 5 is cheaper than GPT-5 Pro at $0.8/M vs $15/M input tokens.
| Spec | GLM 5 | GPT-5 Pro |
|---|---|---|
| Input price | $0.8/M tokens | $15/M tokens |
| Output price | $2.56/M tokens | $120/M tokens |
| Context window | 203K tokens | 400K tokens |
| Weights | Open | Closed |
| Free API (OpenRouter) | No | No |
| Released | Feb 2026 | Oct 2025 |
| SWE-bench Verified | 77.8% | 74.9% |
Our Verdict
GLM 5
GPT-5 Pro
Not enough votes to call it. On the specs, nothing separates them.
GLM 5 costs 47x less per token.
Too close to call
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API pricing
Cost per 1M tokens
GLM 5
Input
$0.80
19× cheaper
Output
$2.56
47× cheaper
GPT-5 Pro
Input
$15.00
Output
$120.00
GLM 5 is cheaper on both: 19× input, 47× output.
Where to run it
9 hosts, cheapest first
GPT-5 Pro1 host
Per million tokens. Prices and uptime via OpenRouter, checked 13 Sep 2026.
Writing DNA
Style Comparison
Similarity
45%
GLM 5 uses 633.6x more bold
GLM 5
GPT-5 Pro
54%Vocabulary65%
17wSentence Length15w
0.37Hedging0.32
6.3Bold0.0
4.7Lists2.9
0.00Emoji0.00
0.60Headings0.00
0.18Transitions0.01
Based on 22 + 11 text responses
Research
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