GLM-5.3

GLM-5.3

Z.ai
+
+

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About

GLM-5.3 is Z.ai’s frontier coding model designed for complex software engineering, long-horizon agent tasks, and advanced post-training research. The model uses the same base model as GLM-5.2, with improvements coming from scaled post-training across more environments, more diverse tasks, and larger compute investment. GLM-5.3 delivers stronger coding performance, better task ownership, improved benchmark results, and greater efficiency across realistic development workflows. It is built to handle complex coding tasks, production-style engineering work, research environments, automation tasks, and agentic workflows that require multi-step execution. The model also shows emergent cyber capabilities in vulnerability discovery and exploitation-chain reasoning, with safety evaluation and hardening planned before open-weight release.

About

Mistral Medium 3.5 is a flagship 128B dense model that merges instruction-following, reasoning, and coding into a single set of weights. It has a 256K context window, configurable reasoning effort, multimodal input, strong agentic capabilities, and is built for long-horizon tasks that require reliable multi-tool use and structured outputs. The model powers remote agents in Mistral Vibe, allowing coding sessions to run in the cloud, work through long tasks independently, and execute multiple sessions in parallel. Agents can be launched from the Vibe CLI or Le Chat, with local CLI sessions moved to the cloud while preserving history, task state, and approvals. Users can inspect file diffs, tool calls, progress states, and questions as work proceeds. Each coding session runs in an isolated sandbox and can handle module refactors, test generation, dependency upgrades, CI investigations, and bug fixes, then open a GitHub pull request for review.

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Supported
iPad Supported
Android Supported
Chromebook Not Supported

Audience

Software engineers, coding agent builders, AI researchers, ML infrastructure teams, security researchers, developer tool teams, automation teams, technical leaders, and organizations that need frontier coding models, long-horizon reasoning, production-style software engineering, benchmark-driven model evaluation, reinforcement learning research, coding-agent integrations, reasoning effort controls, ZCode workflows, and advanced technical task automation

Audience

Developers, engineering teams, and knowledge workers seeking to delegate coding, research, and cross-tool workflows to autonomous cloud-based AI agents

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

Pricing

Free
Open source
Free Version Supported
Free Trial Not Supported

Pricing

$14.99 per month
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Pros & Cons from Real Users

Pros

  • The thing I like most is that GLM-5.3 feels aimed at serious engineering work, not casual prompting. It is built around coding agents, long-running software tasks, debugging, and the kind of multi-step execution that actually matters when you are working inside real repos. The post-training jump is also interesting. Z.ai is not just talking about a bigger model; it is pushing the idea that better training on agentic coding and cyber workflows can make the model more useful in practice.

Cons

  • The cybersecurity angle is impressive, but it is also where I would be most cautious. Strong vulnerability discovery and cyber reasoning can be useful for defense, audits, and secure engineering, but I would want very clear controls around how it is used.

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Z.ai
Founded: 2023
China
z.ai/

Company Information

Mistral AI
Founded: 2023
France
mistral.ai/news/vibe-remote-agents-mistral-medium-3-5/

Alternatives

Alternatives

Mistral Vibe

Mistral Vibe

Mistral AI
Mistral Small 4

Mistral Small 4

Mistral AI
GLM-5

GLM-5

Z.ai
GLM-5.1

GLM-5.1

Z.ai
GLM-5.1

GLM-5.1

Z.ai
Mistral Large

Mistral Large

Mistral AI

Categories

AI Coding Models Supported
AI Models Supported
Foundation Models Supported

Categories

AI Models Supported

Integrations

C Supported
C# Supported
C++ Supported
Claude Code Supported
Claw Code Supported
Dessix Supported
Factory Droid Supported
GLM Coding Plan Supported
HTML Supported
Java Supported
JetBrains Junie Supported
Kilo Code Supported
LM Studio Bionic Supported
OpenCode Go Supported
PyTorch Supported
Sup AI Supported
Tabbit Browser Supported
TypeScript Supported
Vercel AI Gateway Supported
Yonoo Supported

Integrations

C Not Supported
C# Not Supported
C++ Not Supported
Claude Code Not Supported
Claw Code Not Supported
Dessix Not Supported
Factory Droid Not Supported
GLM Coding Plan Not Supported
HTML Not Supported
Java Not Supported
JetBrains Junie Not Supported
Kilo Code Not Supported
LM Studio Bionic Not Supported
OpenCode Go Not Supported
PyTorch Not Supported
Sup AI Not Supported
Tabbit Browser Not Supported
TypeScript Not Supported
Vercel AI Gateway Not Supported
Yonoo Not Supported
Claim GLM-5.3 and update features and information
Claim GLM-5.3 and update features and information
Claim Mistral Medium 3.5 and update features and information
Claim Mistral Medium 3.5 and update features and information