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Description

Fastino operates as an applied AI platform that specializes in open-weight language models along with the Fastino Fine-Tuning Agent. This innovative agent allows users to articulate a task using simple language, subsequently determining the appropriate architecture, generating the necessary training data, conducting training and evaluation, and ultimately delivering a task-specific model that is ready for deployment. Users can initiate and revisit fine-tuning projects through a single interface, ensuring that models are developed according to their specifications and can be deployed within their own environments. The models produced by Fastino are tailored for production-grade efficiency, typically achieving response times of less than 50 milliseconds, while maintaining user ownership and privacy of the model weights. Notably, models can transition from a basic task description to a fully trained output in mere hours, enabling teams to expedite their specialized deployment processes significantly. Additionally, Fastino offers a selection of open-source and open-weight models specifically designed for various specialized AI applications, further enhancing accessibility and versatility for users.

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.

API Access

Has API No 

API Access

Has API Yes 

Screenshots View All

Screenshots View All

Integrations

CSS No 
Cheaper Inference No 
Cherry Studio No 
Cursor No 
Factory Droid No 
Hermes Agent No 
JavaScript No 
JetBrains Junie No 
Kilo Code No 
LM Studio Bionic No 
Ollama No 
OpenClaw No 
OpenCode Go No 
OpenCode Zen No 
Python No 
Rust No 
Sup AI No 
Yonoo No 
Z.ai No 
Zo Computer No 

Integrations

CSS Yes 
Cheaper Inference Yes 
Cherry Studio Yes 
Cursor Yes 
Factory Droid Yes 
Hermes Agent Yes 
JavaScript Yes 
JetBrains Junie Yes 
Kilo Code Yes 
LM Studio Bionic Yes 
Ollama Yes 
OpenClaw Yes 
OpenCode Go Yes 
OpenCode Zen Yes 
Python Yes 
Rust Yes 
Sup AI Yes 
Yonoo Yes 
Z.ai Yes 
Zo Computer Yes 

Pricing Details

No price information available.
Free Trial Yes 
Free Version No 

Pricing Details

Free
Open source
Free Trial No 
Free Version Yes 

Deployment

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

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 Yes 

Types of Training

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

Types of Training

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

Vendor Details

Company Name

Fastino

Founded

2026

Country

United States

Website

fastino.ai/

Vendor Details

Company Name

Z.ai

Founded

2023

Country

China

Website

z.ai/

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