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---
title: "Z AI (Zhipu AI)"
description: "Learn how to configure and use Z AI's GLM-4.5 models with Cline. Experience advanced hybrid reasoning, agentic capabilities, and open-source excellence with regional optimization."
---
Z AI (formerly Zhipu AI) offers the groundbreaking GLM-4.5 series, featuring hybrid reasoning capabilities and agentic AI design. Released in July 2025, these models excel in unified reasoning, coding, and intelligent agent applications while maintaining open-source accessibility under MIT license.
**Website:** [https://z.ai/model-api](https://z.ai/model-api) (International) | [https://open.bigmodel.cn/](https://open.bigmodel.cn/) (China)
### Getting an API Key
#### International Users
1. **Sign Up/Sign In:** Go to [https://z.ai/model-api](https://z.ai/model-api). Create an account or sign in.
2. **Navigate to API Keys:** Access your account dashboard and find the API keys section.
3. **Create a Key:** Generate a new API key for your application.
4. **Copy the Key:** Copy the API key immediately and store it securely.
#### China Mainland Users
1. **Sign Up/Sign In:** Go to [https://open.bigmodel.cn/](https://open.bigmodel.cn/). Create an account or sign in.
2. **Navigate to API Keys:** Access your account dashboard and find the API keys section.
3. **Create a Key:** Generate a new API key for your application.
4. **Copy the Key:** Copy the API key immediately and store it securely.
### Supported Models
Z AI provides different model catalogs based on your selected region:
#### GLM-4.5 Series
- **GLM-4.5** - Flagship model with 355B total parameters, 32B active parameters
- **GLM-4.5-Air** - Compact model with 106B total parameters, 12B active parameters
#### GLM-4.5 Hybrid Reasoning Models
- **GLM-4.5 (Thinking Mode)** - Advanced reasoning with step-by-step analysis
- **GLM-4.5-Air (Thinking Mode)** - Efficient reasoning for mainstream hardware
All models feature:
- **128,000 token context window** for extensive document processing
- **Mixture of Experts (MoE) architecture** for optimal performance
- **Agent-native design** integrating reasoning, coding, and tool usage
- **Open-source availability** under MIT license
### Configuration in Cline
1. **Open Cline Settings:** Click the settings icon (⚙️) in the Cline panel.
2. **Select Provider:** Choose "Z AI" from the "API Provider" dropdown.
3. **Select Region:** Choose your region:
- "International" for global access
- "China" for mainland China access
4. **Enter API Key:** Paste your Z AI API key into the "Z AI API Key" field.
5. **Select Model:** Choose your desired model from the "Model" dropdown.
### Z AI's Hybrid Intelligence
Z AI's GLM-4.5 series introduces revolutionary capabilities that set it apart from conventional language models:
#### Hybrid Reasoning Architecture
GLM-4.5 operates in two distinct modes:
- **Thinking Mode:** Designed for complex reasoning tasks and tool usage, engaging in deeper analytical processes
- **Non-Thinking Mode:** Provides immediate responses for straightforward queries, optimizing efficiency
This dual-mode architecture represents an "agent-native" design philosophy that adapts processing intensity based on query complexity.
#### Exceptional Performance
GLM-4.5 achieves a comprehensive score of **63.2** across 12 benchmarks spanning agentic tasks, reasoning, and coding challenges, securing **3rd place** among all proprietary and open-source models. GLM-4.5-Air maintains competitive performance with a score of **59.8** while delivering superior efficiency.
#### Mixture of Experts Excellence
The sophisticated MoE architecture optimizes performance while maintaining computational efficiency:
- **GLM-4.5:** 355B total parameters with 32B active parameters
- **GLM-4.5-Air:** 106B total parameters with 12B active parameters
#### Extended Context Capabilities
The 128,000-token context window enables comprehensive understanding of lengthy documents and codebases, with real-world testing confirming effective processing of nearly 2,000-line codebases while maintaining remarkable performance.
#### Open-Source Leadership
Released under MIT license, GLM-4.5 provides researchers and developers with access to state-of-the-art capabilities without proprietary restrictions, including base models, hybrid reasoning versions, and optimized FP8 variants.
### Regional Optimization
#### API Endpoints
- **International:** Uses `https://api.z.ai/api/paas/v4`
- **China:** Uses `https://open.bigmodel.cn/api/paas/v4`
#### Model Availability
The region setting determines both API endpoint and available models, with automatic filtering to ensure compatibility with your selected region.
### Special Features
#### Agentic Capabilities
GLM-4.5's unified architecture makes it particularly suitable for complex intelligent agent applications requiring integrated reasoning, coding, and tool utilization capabilities.
#### Comprehensive Benchmarking
Performance evaluation encompasses:
- **3 agentic task benchmarks**
- **7 reasoning benchmarks**
- **2 coding benchmarks**
This comprehensive assessment demonstrates versatility across diverse AI applications.
#### Developer Integration
Models support integration through multiple frameworks:
- **transformers**
- **vLLM**
- **SGLang**
Complete with dedicated model code, tool parser, and reasoning parser implementations.
### Performance Comparisons
#### vs Claude 4 Sonnet
GLM-4.5 shows competitive performance in agentic coding and reasoning tasks, though Claude Sonnet 4 maintains advantages in coding success rates and autonomous multi-feature application development.
#### vs GPT-4.5
GLM-4.5 ranks competitively in reasoning and agent benchmarks, with GPT-4.5 generally leading in raw task accuracy on professional benchmarks like MMLU and AIME.
### Tips and Notes
- **Region Selection:** Choose the appropriate region for optimal performance and compliance with local regulations.
- **Model Selection:** GLM-4.5 for maximum performance, GLM-4.5-Air for efficiency and mainstream hardware compatibility.
- **Context Advantage:** Large 128K context window enables processing of substantial codebases and documents.
- **Open Source Benefits:** MIT license enables both commercial use and secondary development.
- **Agentic Applications:** Particularly strong for applications requiring reasoning, coding, and tool usage integration.
- **Hybrid Reasoning:** Use Thinking Mode for complex problems, Non-Thinking Mode for simple queries.
- **API Compatibility:** OpenAI-compatible API provides streaming responses and usage reporting.
- **Framework Support:** Multiple integration options available for different deployment scenarios.