Skip to main content
GLM 5.3 is Z.ai’s frontier open model for complex coding tasks and long-running agents. It delivers frontier-class reasoning with native tool calling and a 1M context window.

Specifications

Pricing

A 30% automatic discount is applied to all GLM 5.3 usage on MatterAI.

Quick Start

cURL
OpenAI NodeJS SDK
OpenAI Python SDK

When to Use

GLM 5.3 is the choice for demanding workloads: complex multi-file coding tasks, long-running agentic pipelines, deep reasoning over large codebases, and production agents that need frontier-class capability at open-model pricing.