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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

API Access

Has API

Screenshots View All

Screenshots View All

No images available

Integrations

APIFree
Amp
Augment Code
C
C++
CSS
Claw Code
Cosmos
Cursor
Kotlin
LM Studio Bionic
OpenClaw
PHP
R
Roo Code
SQL
Sup AI
Tabbit Browser
Together AI
ZCode

Integrations

APIFree
Amp
Augment Code
C
C++
CSS
Claw Code
Cosmos
Cursor
Kotlin
LM Studio Bionic
OpenClaw
PHP
R
Roo Code
SQL
Sup AI
Tabbit Browser
Together AI
ZCode

Pricing Details

Free
Open source
Free Trial
Free Version

Pricing Details

No price information available.
Free Trial
Free Version

Deployment

Web-Based
On-Premises
iPhone App
iPad App
Android App
Windows
Mac
Linux
Chromebook

Deployment

Web-Based
On-Premises
iPhone App
iPad App
Android App
Windows
Mac
Linux
Chromebook

Customer Support

Business Hours
Live Rep (24/7)
Online Support

Customer Support

Business Hours
Live Rep (24/7)
Online Support

Types of Training

Training Docs
Webinars
Live Training (Online)
In Person

Types of Training

Training Docs
Webinars
Live Training (Online)
In Person

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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