GLM-5.3

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An open-source language model for complex software engineering and long-running agent tasks, with a one-million-token context window.

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Z.ai

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GLM-5.3 builds on the same base model as GLM-5.2, with its changes coming from post-training. Z.ai focused that development on complex software engineering and longer agent tasks. The model supports text input, an extended context window and adjustable reasoning effort. Its release illustrates a route to improving an existing model foundation through additional training focused on how it plans and carries out work.

Built with

vLLM

vLLM is documented as a serving implementation for GLM-5.3, including commands to serve the model and support for reasoning and tool-call parsing.

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Put your name behind GLM-5.3.

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GLM-5.3

View Docs

An open-source language model for complex software engineering and long-running agent tasks, with a one-million-token context window.

Links

Built by

Z.ai

Cosigned by

No cosigns yet

Built with

vLLM

vLLM is documented as a serving implementation for GLM-5.3, including commands to serve the model and support for reasoning and tool-call parsing.

Be the first Cosign

Put your name behind GLM-5.3.

Add it to your Products I use list. You can also share why you use it.

Product name

Story

Product name

Story

Product name

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Product name

Story

GLM-5.3

Built with

vLLM

Put your name behind GLM-5.3.

Product name

Story

GLM-5.3

Built with

vLLM

Put your name behind GLM-5.3.