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What is GLM-5.3?

GLM-5.3 is Z.ai’s frontier coding model built to improve complex software engineering, long-horizon agent work, and advanced technical reasoning through scaled post-training. The model uses the same base model as GLM-5.2, with performance gains coming from additional post-training environments, more diverse tasks, and expanded compute on the existing training stack. Z.ai’s stack includes IndexShare for efficient long-context processing, SAO for reinforcement learning on long-horizon tasks, and slime for large-scale asynchronous post-training. GLM-5.3 is designed to perform better on work that resembles real engineering tasks rather than short coding exercises. Its training environments include production-style workflows where the model must diagnose bottlenecks, inspect documentation, use codebases, run experiments, implement changes, and produce measurable improvements. The model improves coding performance across public and private benchmarks, including Terminal Bench 3.0, DeepSWE, Agents’ Last Exam, and Z.ai Code Bench. GLM-5.3 also improves token efficiency, producing stronger agentic coding results than GLM-5.2 while using fewer output tokens in Z.ai’s internal evaluations. The model supports three reasoning effort levels, low, high, and max, and no longer supports disabling thinking. Z.ai recommends max reasoning effort for coding tasks, while applications using disabled thinking must migrate to enabled thinking before switching to GLM-5.3. The release also reports emergent cyber capabilities, including stronger vulnerability discovery and exploitation-chain reasoning, with open-weight release planned after safety evaluation and hardening. By combining scaled post-training, long-context infrastructure, long-horizon reinforcement learning, coding-agent workflows, benchmark improvements, reasoning controls, and ZCode integration, GLM-5.3 helps developers and researchers work on demanding coding and agentic tasks.

What is Fugu Cyber?

Fugu Cyber represents a sophisticated orchestration framework crafted explicitly for modern cyber defense, operating seamlessly as a single unit through one API endpoint while skillfully coordinating various specialized agents to address complex security issues. This cutting-edge model operates independently of any single provider and is designed for two primary defensive functions: evaluating intricate codebases to uncover real vulnerabilities and translating raw cyber threat intelligence into practical detection rules. Its performance metrics on CyberGym, which assesses vulnerability analysis and validation, showcased an impressive success rate of 86.9%, while on CTI-REALM, which measures the creation of detection rules from threat intelligence reports, it garnered a score of 72.1%. Such outcomes position Fugu Cyber among the elite models dedicated to advancements in cybersecurity. Rather than being a standalone solution, Fugu Cyber acts as the cognitive core within comprehensive security frameworks, bolstering overall defensive capabilities against emerging cyber threats. This strategic integration fosters a more cohesive approach to cyber defense, empowering organizations to respond with greater efficiency to potential incursions. Additionally, it allows for continuous improvement in threat detection and response strategies, making it an invaluable asset in the ever-evolving cybersecurity landscape.

Media

Media

Integrations Supported

OpenRouter
Amp
C#
CREAO
Grok Build
Hermes Agent
Java
Kilo Code
Kotlin
LM Studio Bionic
OpenClaw
OpenCode Zen
Python
Roo Code
SQL
Shiori
Yonoo
Z.ai
Zo Computer
pandas

Integrations Supported

OpenRouter
Amp
C#
CREAO
Grok Build
Hermes Agent
Java
Kilo Code
Kotlin
LM Studio Bionic
OpenClaw
OpenCode Zen
Python
Roo Code
SQL
Shiori
Yonoo
Z.ai
Zo Computer
pandas

API Availability

Has API

API Availability

Has API

Pricing Information

Free
Open source
Free Version
Free Trial Offered?

Pricing Information

$6 per 1M tokens (input)
$6 per 1M tokens (input), $36 per 1M tokens (output)
Free Version
Free Trial Offered?

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Z.ai

Date Founded

2023

Company Location

China

Company Website

z.ai/

Company Facts

Organization Name

Sakana AI

Date Founded

2023

Company Location

Japan

Company Website

sakana.ai/fugu/

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