What makes GLM 5.1 different from other open-source models?

GLM 5.1 is uniquely optimized for long-duration engineering tasks, capable of working autonomously for up to 8 hours, and is the first open-source model to rival Claude Opus 4.6 on major coding benchmarks like NL2Repo.

How many parameters does GLM 5.1 have?

The model features 754 billion parameters, making it one of the largest and most powerful open-weight models available.

Where can I download the model weights?

The model is available through the official Hugging Face repository at huggingface.co/zai-org/GLM-5.1 and on GitHub.

How does it compare to Claude Opus?

In terms of code quality, GLM 5.1 is designed to rival Claude Opus 4.6, specifically excelling in complex engineering and programming benchmarks.

Is GLM 5.1 free to use?

Yes, GLM 5.1 is an open-weight model, allowing users to access its capabilities and integrate it into their own workflows without a subscription cost.

What benchmarks does GLM 5.1 lead in?

It is the world's first open-source model to achieve top rankings on WE-Bench Pro and NL2Repo.

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LLM models

Free

GLM 5.1

A 754B parameter open-weight model designed for complex engineering tasks and 8-hour autonomous operation, rivaling Claude Opus 4.6 in code quality and technical reasoning.

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Rating

Reviews

Upvotes

5 months ago

Listed

AI Useful

LLM models

Open-Weight

Engineering AI

Code Generation

Autonomous Agents

WE-Bench Pro

NL2Repo

Large Language Model

Developer Tools

Tool information

Provider

Z.ai

Platforms

Web

Linux

Windows

Mac

Languages

English

Chinese

API Available

Yes

Added to directory

5 months ago

Last updated

3 months ago

Rating

Not available

Pricing

Free

About GLM 5.1

What the tool does and who it's for

GLM 5.1 is a high-performance open-weight Large Language Model featuring 754 billion parameters, specifically engineered for long-form and complex technical tasks. It stands out as the world’s first open-source model to excel on benchmarks like WE-Bench Pro and NL2Repo, demonstrating code quality comparable to Claude Opus 4.6. Designed for autonomy, the model can manage end-to-end engineering workflows for up to 8 hours continuously, handling everything from initial planning and logic structuring to final project delivery and implementation.

Key capabilities

754 Billion Parameters: Massive scale architecture for advanced reasoning and complex problem-solving.

Autonomous Engineering: Capable of operating independently for up to 8 hours straight from planning to delivery.

High Code Quality: Benchmarked as a leader on NL2Repo and WE-Bench Pro, rivaling proprietary models like Claude Opus 4.6.

Open-Weight Access: Available for community use and deployment via Hugging Face and GitHub.

Complex Task Management: Optimized for long-duration workflows and multi-step engineering logic.

Benchmark Pioneer: First open-source model to reach top-tier status on professional-grade coding evaluations.

Technical Documentation: Comprehensive guides and API documentation available for developers.

Multi-Platform Integration: Supported via Hugging Face and GitHub repositories for various environments.

Pricing

Free — plans below

Open-Weight

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GLM 5.1 FAQs

Common questions about GLM 5.1