GLM-5: Z.ai Models for Long-Horizon Agentic Engineering

Overview

GLM-5 is Z.ai’s open-weight model family, built around the GLM series of large language models. It targets complex systems engineering and long-horizon agentic tasks, where a model needs to plan, use tools, and keep making progress across extended coding or operational work.

The repository brings together documentation and download links for GLM-5 and later family members, including GLM-5.1, GLM-5.2, and GLM-5.3. You can access the models through Z.ai’s API or run them with supported frameworks such as SGLang, vLLM, and Transformers. This is primarily a model distribution and guidance repository, rather than a standalone agent application.

Key Features

• Provides open-weight GLM-5 family checkpoints, including FP8 and BF16 options for several variants.
• Targets coding, complex systems engineering, and extended agentic tasks.
• Offers model variants with different architectures and sizes, including the 320B-A18B GLM-5.3-Flash and 744B-A40B models.
• Documents local serving options through SGLang, vLLM, Transformers, KTransformers, and other listed frameworks.
• Describes long-context capabilities, including GLM-5.2’s 1M-token context and its IndexShare attention design.
• Includes guidance for controlling reasoning effort on supported newer models.
• Points to fine-tuning options through Slime and ms-swift.

Use Cases

• Software engineering teams can evaluate GLM models for code generation, repository-level work, and terminal-based tasks.
• Agent developers can test models on workflows that require repeated tool use, planning, and iteration over a long session.
• Research groups can download model weights to study long-context, coding, or agentic model behavior.
• Inference teams can compare the documented serving frameworks and model variants when planning self-hosted deployment.

Getting Started

Choose a model from the download table in the README, then follow the listed serving framework’s instructions. For example, the README links to SGLang’s GLM-5.3 guide and vLLM’s GLM-5.3 recipes. Check the README for model-specific guidance and options.

Alternatives

• GLM-4.5: GLM-4.5 is an earlier open-weight Z.ai model family for reasoning, coding, and tool-using agents, rather than GLM-5's newer capabilities.

Considerations

• The largest listed checkpoints are 744B-A40B models, so local inference can demand significant hardware and operational capacity. The README links to serving frameworks but does not specify a universal hardware setup.
• The repository data lists Python as a runtime requirement, but does not list tests or CI. Treat the repository as model documentation and distribution guidance, not as a verified end-to-end serving package.
• The project is active, with recent commits and issue closures, but has had no release in over a year. Its contributor base is not flagged as concentrated.
• The models are distributed under Apache-2.0. Review the license and the terms attached to any external model hosting or API service you use.