Claude Sonnet 4vsGLM 5
GLM 5 is cheaper than Claude Sonnet 4 at $0.8/M vs $3/M input tokens.
| Spec | Claude Sonnet 4 | GLM 5 |
|---|---|---|
| Input price | $3/M tokens | $0.8/M tokens |
| Output price | $15/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 | 72.7% | 77.8% |
Our Verdict
GLM 5
Claude Sonnet 4Runner-up
Not enough votes to call it. On the specs, GLM 5 has the edge: bigger model tier, newer.
GLM 5 costs 5.9x less per token.
Too close to call
API pricing
Cost per 1M tokens
Claude Sonnet 4
Input
$3.00
Output
$15.00
GLM 5
Input
$0.80
3.8× cheaper
Output
$2.56
5.9× cheaper
GLM 5 is cheaper on both: 3.8× input, 5.9× output.
Where to run it
12 hosts, cheapest first
Claude Sonnet 42 hosts
Per million tokens. Prices and uptime via OpenRouter, checked 8 Sep 2026.
Writing DNA
Style Comparison
Similarity
44%
Claude Sonnet 4 uses 70.1x more emoji
Claude Sonnet 4
GLM 5
64%Vocabulary54%
81wSentence Length17w
0.56Hedging0.37
4.5Bold6.3
6.6Lists4.7
0.70Emoji0.00
1.59Headings0.60
0.20Transitions0.18
Based on 28 + 22 text responses
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