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Description

GLM-5.3 is Z.ai’s advanced coding and agentic reasoning model built through scaled post-training on top of the GLM-5.2 base model. The release focuses on frontier coding, long-horizon software engineering, agent tasks, cyber evaluation, and reinforcement learning at scale. GLM-5.3 improves significantly over GLM-5.2 on complex coding benchmarks, real-world engineering environments, Terminal Bench 3.0, DeepSWE, Agents’ Last Exam, and Z.ai’s internal Code Bench. The model is trained on environments that resemble real professional work, including tasks involving codebases, infrastructure, documentation, compute clusters, experiments, bottleneck diagnosis, implementation, testing, and measurable optimization. Z.ai’s post-training stack includes IndexShare for efficient long-context processing, SAO for reinforcement learning on long-horizon tasks, and slime for large-scale asynchronous training. GLM-5.3 supports three thinking effort levels, including low, high, and max, with max recommended for coding tasks. The model also demonstrates emergent cyber capabilities across vulnerability discovery and exploitation benchmarks, prompting continued safety evaluation and hardening before weights are released. GLM-5.3 can be used through the GLM Coding Plan, ZCode, Claude Code, OpenCode, and other coding agent workflows. By combining stronger coding performance, long-horizon task execution, post-training scale, cyber evaluation, reasoning effort controls, and coding-agent integrations, GLM-5.3 supports advanced developer and research workflows.

Description

Merrymake is a European AI think tank and dedicated research lab based in Aarhus, Denmark. We are actively working to accelerate a safe and sovereign transition to Artificial Superintelligence (ASI). Our core mission is to ensure that superhuman intelligence benefits all of life, humanity, and every individual. Operating at the technical frontier, our team approaches both AI capability and alignment as unified, solvable engineering challenges. Our research spans the full stack of frontier AI development. We are designing a tomorrow worth arriving at, where progress amplifies human potential without ever sacrificing well-being, dignity, or human agency.

API Access

Has API Yes 

API Access

Has API No 

Screenshots View All

Screenshots View All

No images available

Integrations

APIFree Yes 
C Yes 
Cheaper Inference Yes 
Claw Code Yes 
ClinePass Yes 
Cosmos Yes 
Factory Droid Yes 
HTML Yes 
JetBrains Junie Yes 
LM Studio Bionic Yes 
Ollama Yes 
OpenRouter Yes 
PyTorch Yes 
Python Yes 
R Yes 
Roo Code Yes 
Sup AI Yes 
Wafer Yes 
Z.ai Yes 
pandas Yes 

Integrations

APIFree No 
C No 
Cheaper Inference No 
Claw Code No 
ClinePass No 
Cosmos No 
Factory Droid No 
HTML No 
JetBrains Junie No 
LM Studio Bionic No 
Ollama No 
OpenRouter No 
PyTorch No 
Python No 
R No 
Roo Code No 
Sup AI No 
Wafer No 
Z.ai No 
pandas No 

Pricing Details

Free
Open source
Free Trial No 
Free Version Yes 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Deployment

Web-Based Yes 
On-Premises Yes 
iPhone App No 
iPad App No 
Android App No 
Windows Yes 
Mac Yes 
Linux Yes 
Chromebook No 

Deployment

Web-Based No 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs No 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Z.ai

Founded

2023

Country

China

Website

z.ai/

Vendor Details

Company Name

Merrymake

Founded

2021

Country

Denmark

Website

merrymake.eu

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