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

Gemini 3.5 Flash is Google’s latest frontier AI model designed to combine advanced intelligence, high-speed performance, and agentic workflow execution for developers, enterprises, and everyday users. Built as part of the Gemini 3.5 family, the model excels at coding, long-horizon reasoning, multimodal understanding, and complex multi-step automation tasks while delivering significantly faster output speeds than many competing frontier models. Gemini 3.5 Flash powers AI agents capable of planning, executing, and managing workflows such as application development, codebase maintenance, data analysis, and financial document preparation through the Antigravity harness. The model also supports rich multimodal experiences by generating interactive graphics, dynamic web interfaces, animations, and advanced visual content. Gemini 3.5 Flash is integrated across Google products including the Gemini app, Google Search AI Mode, Google Antigravity, Google AI Studio, Android Studio, and more.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

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, enterprises, AI engineers, business teams, and organizations seeking high-performance multimodal AI models for coding, automation, agentic workflows, and intelligent application development

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

Free
Open source
Free Version
Free Trial

Pricing

$1.50 per 1M tokens (input)
Input: $1.50 per 1 million tokens
Output: $9.00 per 1 million tokens
Free Version
Free Trial

Reviews/Ratings

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

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5
design 5.0 / 5
support 5.0 / 5

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.

Pros & Cons from Real Users

Pros

  • Gemini 3.5 Flash is seriously impressive when it comes to speed. What stands out most is that it delivers high-end AI performance without feeling slow or heavy. Responses are fast, coding help is excellent, and it handles complex multi-step tasks far better than previous Gemini models. For someone who uses AI constantly throughout the workday, that balance of speed and intelligence makes a huge difference. I’ve also been impressed by how capable it is with agentic workflows. Whether it’s organizing research, generating documents, helping with coding, or handling long prompts with lots of context, 3.5 Flash feels much more reliable and focused. It’s especially useful inside the Gemini app and Workspace tools because it can actually help complete tasks instead of just answering questions. The multimodal improvements are another huge plus. The model handles text, graphics, UI generation, and interactive content much better than before. It feels more polished and more practical for real-world work, especially for developers, analysts, and teams handling large projects.

Cons

  • Even though the model is incredibly fast, there are still occasional moments where outputs need refinement, especially for highly technical or nuanced requests. I still review important drafts, code, or generated workflows before fully relying on them.

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Z.ai
Founded: 2023
China
z.ai/

Company Information

Google
Founded: 1998
United States
gemini.google.com

Alternatives

Grok 4.6

Grok 4.6

SpaceXAI

Alternatives

Grok 4.6

Grok 4.6

SpaceXAI
Claude Opus 5

Claude Opus 5

Anthropic
Claude Opus 5

Claude Opus 5

Anthropic
Claude Fable 5

Claude Fable 5

Anthropic
Claude Fable 5

Claude Fable 5

Anthropic
GLM-5

GLM-5

Z.ai
GLM-5.1

GLM-5.1

Z.ai
Gemini 4

Gemini 4

Google

Categories

Categories

Integrations

C
C#
C++
CSS
Cursor
Factory Droid
Go
HTML
Java
JavaScript
JetBrains Junie
OpenClaw
PHP
Python
R
Rust
SQL
Swift
TypeScript
Vercel AI Gateway

Integrations

C
C#
C++
CSS
Cursor
Factory Droid
Go
HTML
Java
JavaScript
JetBrains Junie
OpenClaw
PHP
Python
R
Rust
SQL
Swift
TypeScript
Vercel AI Gateway
Claim GLM-5.3 and update features and information
Claim GLM-5.3 and update features and information
Claim Gemini 3.5 Flash and update features and information
Claim Gemini 3.5 Flash and update features and information