Model•active

GLM-5.3

GLM-5.3 is Z.ai's 744B-parameter open-weight MoE flagship with 40B active parameters and a 1,048,576-token context window for coding, reasoning, and long-horizon agentic work.

Official siteVerified Oct 5, 2026

Overview

GLM-5.3 uses the same base model as GLM-5.2 with updated post-training focused on complex coding and long-horizon tasks. Its weights are published under the custom GLM-5.3 License.

Model specifications

Family: GLM-5.3
Context: 1,048,576 tokens
Input: Text
Output: Text
Open weights: Yes
Capabilities: Reasoning

Related entities

Belongs To

Model Familyactive

GLM-5.3

GLM-5.3 is Z.ai's current open-weight GLM generation for coding, reasoning, long-horizon agentic tasks, and efficient multimodal inference.

Related by Develops

Companyactive

Z.ai

Z.ai develops the GLM model family and publishes open-weight coding, reasoning, multimodal, and agent-oriented models.