Z.ai: GLM 5.1 vs Z.ai: GLM 5
Side-by-side comparison. Updated 2026-06-07.
Verdict
Z.ai: GLM 5.1 wins on higher overall score (9.1 vs 8.9, +0.2).
Both models score equally. Pick based on which strengths align with your workload.
At a Glance
| Attribute | Z.ai: GLM 5.1 | Z.ai: GLM 5 |
|---|---|---|
| Provider | Z Ai | Z Ai |
| Tags | Intelligent Coding Agentic | Intelligent Coding Agentic Open Weight |
| Context | 202,752 tokens | 202,752 tokens |
| Input price | $0.98/1M | $0.60/1M |
| Output price | $1.92/1M | $1.92/1M |
| Input modalities | Text | Text |
| Output modalities | Text | Text |
Z.ai: GLM 5.1 Strengths
- Top-tier coding and long-horizon task completion
- Strong agentic reasoning for multi-step workflows
- Configurable reasoning depth for cost/quality tradeoffs
- Excellent instruction following on complex tasks
Z.ai: GLM 5 Strengths
- Flagship open-source model rivaling closed-source leaders
- Advanced agentic planning and full-system construction
- Deep backend reasoning with iterative self-correction
- Production-grade on large-scale programming tasks