Z.ai · GLM 5.3
GLM 5.3 Flash
Z.ai's fast, low-cost coding model.
What it is
GLM 5.3 Flash is a sparse mixture-of-experts model that fires only about 18 billion of its roughly 320 billion parameters per token, which keeps long agent runs cheap.
It holds near-frontier agentic coding scores while excelling at playable games, WebGL and 3D, and visual experiments — the model to reach for when a Skill will run again and again, or when the work is exploratory.
Profiles describe the model, not a guarantee: the Skill folder is what makes the work repeatable, and the agent's settings decide what the model can reach.
What it's best at
The work this engine is built for, and where it earns its place in a run.
One-shot websites
Turns a single prompt into a page or a browser game at flash speed.
Browser 3D
Three.js scenes, WebGL and visual experiments that run in the browser.
Agentic coding
Near-frontier coding scores from a model that costs a fraction per token.
High-volume runs
The sparse architecture keeps long, repeated agent runs inexpensive.
A good first run
Three image Skills to try on GLM 5.3 Flash — each one a folder of instructions the model can pick up straight away.
Image · Design & Media
Infographic Designer
Turn articles, notes, data or pasted text into a polished infographic plate.
Image · Marketing & Growth
E-commerce Detail Page Expert
Generate a high-end 3x3 visual strategy for product detail pages — nine hero-image prompts plus NeoSpark preview renders.
Image · Design & Media
NeoSpark Image Gen
Generate, edit and fuse images through the NeoSpark API — text-to-image, image-to-image and multi-reference.
Other models
The rest of the engine room.
Anthropic · Claude 5.5
Opus 5.5
Anthropic's newest frontier model, built to carry long, multi-step work from one prompt to a finished result.
- Context
- 1M tokens
- Best at
- Agentic coding
OpenAI · GPT-6
GPT-6 Astra
OpenAI's frontier model for end-to-end agentic work, reasoning across a task rather than a single turn.
- Context
- ≈1M tokens
- Best at
- End-to-end work
Anthropic · Claude Fable 5.1
Fable 5.1
Anthropic's top model for demanding reasoning and long-horizon agentic work, with adaptive thinking.
- Context
- 1M tokens
- Best at
- Demanding reasoning
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