GLM-5.1

Z.ai flagship GLM model for agentic engineering, coding assistance, and reasoning workflows.

Z.ai · GLM

Editorial review

Reviewed byOpenSourcesAI EditorialLast updatedJune 2026SourcesZ.ai model docs, Hugging Face

Model checkpoints, context windows, provider support, local runtime compatibility, and license terms can change quickly. Verify the exact model card before production or commercial use.

Best for

Teams evaluating open-weight models for tool-calling, software engineering, and agent systems.

Who should use it

Teams evaluating open-weight models for tool-calling, software engineering, and agent systems.
Teams with access to hosted inference or server-class deployment paths.
Developers evaluating coding assistant, repo-editing, and code review workflows.
Teams testing tool-use, agentic planning, and multi-step workflow behavior.

Common workflows

Agentic engineering, coding, tool use, reasoning
agents workflows
coding workflows
reasoning workflows
tool-use workflows

Deployment and hardware notes

Full model is server-class; smaller Air or Flash style variants are usually better for local testing.

License and usage notes

Check model card. Open weights where released. Verify the exact model card and license terms for the checkpoint or hosted provider you use.

Strengths

Open weights where released model option for GLM workflows.
Teams evaluating open-weight models for tool-calling, software engineering, and agent systems.
Tracked as Frontier 2026 in the OpenSourcesAI model directory.

Limitations

Large model; production fit depends on serving support, license review, and current API/model availability.
Full model is server-class; smaller Air or Flash style variants are usually better for local testing.
Context window and limits: 202,752 tokens, confirmed from the model's published config.
Verify the exact model card, provider docs, license, and serving support before production use.

Frontier-model verification note

This page is written to stay accurate as of the latest available 2026 public model information. Availability, licenses, context windows, API support, pricing, benchmark standing, and local-serving support can change quickly. Verify the official model card, provider docs, and license before using this model in production or commercial workflows.