MODELS

Z.ai: GLM Flash Latest

by Z.ai

modellead-sourceopenrouter-modelsmultimodallong-contextvisionvideoGLMZ.aisource:autoclaw.z.aisource:z.ai

Overview

Z.ai’s natively multimodal GLM-5 model with a 1M-token context window.

Details

GLM-5.3-Flash is a Z.ai GLM-5 model whose documented API model code is `glm-5.3-flash`. Z.ai describes it as natively multimodal, with 320B total parameters and 18B active parameters. Its model guide documents text, image, video, and file inputs, while the Z.ai model catalog lists a 1M-token context window and English and Chinese support. The linked Chat Completion API supports bearer-token authentication, multimodal messages, tool use, and streaming.

When to Use

Build workflows that combine text, images, video, or files in a single model interaction. Process long documents or other workloads that benefit from the documented 1M-token context window. Integrate a model through Z.ai’s Chat Completion API with streaming or tool use.

Getting Started

Read the GLM-5.3-Flash overview in Z.ai Developer Documentation.
Create a Z.ai API integration authenticated with a bearer token.
Call the Chat Completion API using the model code `glm-5.3-flash`.
Test representative text, image, video, and file inputs before deployment.

Key Features

•Natively multimodal GLM-5 model
•320B total parameters and 18B active parameters
•Text, image, video, and file inputs
•1M-token context window
•Chat Completion API support for tool use and streaming

Capabilities

•text input
•image input
•video input
•file input
•long-context processing
•tool use
•streaming

Last updated Sep 3, 2026