Claude Opus 4vsGLM 5
GLM 5 is cheaper than Claude Opus 4 at $0.8/M vs $15/M input tokens.
| Spec | Claude Opus 4 | GLM 5 |
|---|---|---|
| Input price | $15/M tokens | $0.8/M tokens |
| Output price | $75/M tokens | $2.56/M tokens |
| Context window | 200K tokens | 203K tokens |
| Weights | Closed | Open |
| Free API (OpenRouter) | No | No |
| Released | May 2025 | Feb 2026 |
| SWE-bench Verified | 72.5% | 77.8% |
Our Verdict
Claude Opus 4
GLM 5
Not enough votes to call it. On the specs, nothing separates them.
GLM 5 costs 29x less per token.
Too close to call
Reviewing agent-written code?See a Brief PR report
API pricing
Cost per 1M tokens
Claude Opus 4
Input
$15.00
Output
$75.00
GLM 5
Input
$0.80
19× cheaper
Output
$2.56
29× cheaper
GLM 5 is cheaper on both: 19× input, 29× output.
Where to run it
9 hosts, cheapest first
Claude Opus 41 host
Per million tokens. Prices and uptime via OpenRouter, checked 13 Sep 2026.
Writing DNA
Style Comparison
Similarity
45%
Claude Opus 4 uses 118.4x more emoji
Claude Opus 4
GLM 5
65%Vocabulary54%
57wSentence Length17w
0.67Hedging0.37
3.8Bold6.3
6.8Lists4.7
1.18Emoji0.00
1.42Headings0.60
0.22Transitions0.18
Based on 27 + 22 text responses
Research
What we learned reading every model
FAQ
Common questions
Keep exploring
