Model comparison
GLM-5.1 vs Claude 4 Sonnet
Capability radar, value bars, and side-by-side posture.
GLM-5.1
Not scored
value score
Claude 4 Sonnet
91
value score
GLM-5.1 ctx
—
Claude 4 Sonnet ctx
200K
Capability radar
Value · context · multimodal · openness · speed posture
Value head-to-head
- Claude 4 Sonnet91
Attribute tape
| Field | GLM-5.1 | Claude 4 Sonnet |
|---|---|---|
| Developer | Z.ai | Anthropic |
| Context | — | 200K |
| Modalities | Text, Code, Image | |
| Openness | — | Proprietary Model |
| Speed | — | Fast |
| Price | — | $3/1M in · $15/1M out |
| Value score | — | 91 |
| Summary | GLM-5.1 is Z.ai's open-weight large language model designed for agentic engineering workflows, including long-horizon coding tasks, tool use, and autonomous software development. It ships with thinking mode enabled by default and targets sustained multi-step reasoning for developer and agent pipelines. | Balanced Claude model for coding and agents. |