GLM-5.1 is Z.ai's refinement flagship released in April 2026, a 744B-parameter MoE model with 40B active parameters per token. It targets long-horizon agentic coding, multi-file refactoring, and terminal work, sustaining up to 8-hour autonomous tasks through a 200K context window and 128K maximum output.
QUICK FACTS
WHY WE PICKED IT
GLM-5.1 is the open-weight coding release that made Z.ai competitive on long-horizon agentic work while remaining MIT-licensed for unrestricted commercial use.
OFFICIAL LINKS
SIMILAR TOOLS
PRICING
Requires a paid subscription.
FEATURED IN GUIDES
The most-starred CLAUDE.md on GitHub has four rules, not twelve, and the error rates everyone quotes...
The benchmark gap has largely closed: open models now score within a point of the closed frontier on...
Capacity decides whether a model runs. Bandwidth decides how fast it talks, and it is the number mos...
Running a frontier open model locally is a memory problem before it is a speed problem, and a bandwi...
Abliteration removes a model's ability to refuse by deleting one direction from its activations. It ...
EXPLORE ALTERNATIVES
Compare GLM-5.1 with 5+ similar llms AI tools.
FREQUENTLY ASKED QUESTIONS
Is GLM-5.1 free?
No, GLM-5.1 requires a paid subscription.
Does GLM-5.1 have an API?
Yes, GLM-5.1 offers an API for programmatic integration.
What is GLM-5.1 best for?
GLM-5.1 is best for Long-Horizon Coding. GLM-5. GLM-5.1 is the open-weight coding release that made Z.ai competitive on long-horizon agentic work while remaining MIT-licensed for unrestricted commercial use.
What platforms does GLM-5.1 support?
GLM-5.1 supports web, api, local.
Is GLM-5.1 open source?
Yes, GLM-5.1 is open source. You can access the source code, contribute, and deploy it on your own infrastructure.
How do I use GLM-5.1?
GLM-5.1 is a large language model for text generation, analysis, and conversation. Access through the web interface. Enter prompts or questions to get responses.
FEATURED ON CURATEDAI
Work on GLM-5.1? You're hand-reviewed in our directory. Add this badge to your site — it links back to this profile.
