Z Ai: Z.ai: GLM 5.1
GLM-5.1 delivers a major leap in coding capability, with particularly significant gains in handling long-horizon tasks. Unlike previous models built around minute-level interactions, GLM-5.1 can work independently and continuously on...
Specifications
| Attribute | Value |
|---|---|
| Lab | Z Ai |
| Tags | Intelligent Coding Agentic |
| Release Date | 2026-04 |
| Context Window | 202,752 tokens |
| Input Price / 1M | $0.98 |
| Output Price / 1M | $3.08 |
| Input Modalities | Text |
| Output Modalities | Text |
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
Weaknesses
- Higher latency on deep reasoning mode
- Limited multimodal capabilities vs vision models
Best For
- Complex multi-file coding projects
- Autonomous agent workflows
- Deep reasoning and analysis
In Depth: Z.ai: GLM 5.1
Summary
Z.ai: GLM 5.1 is an AI model from Z Ai.
Released 2026-04. It currently appears in the Overall category on LMRank. It supports Text input and produces Text output, with a context window of 202,752 tokens. Input pricing is $0.98 per 1M tokens and output is $3.08 per 1M tokens on OpenRouter.