01 / Web Agent · Live preview
Describe it.
Watch it build.
Five agent modes, a workspace that keeps your files, and 100 free Atoms a day — right in the browser. No install, no signup, no card.
Live on free models. Real replies from GPT-OSS-20B — scripted preview only if the provider hiccups. Modes cost different Atoms: Plan/Explain 1 · Review/Debug 2 · Build 3.
How a run works
Plan → code → run.
In one pass.
Pick a mode. Build ships code, Plan only plans, Review finds issues, Debug hunts root cause, Explain teaches.
Watch it work. Every step streams live — plan, edits, output — nothing hidden.
Take the files. Output lands in the workspace: view, copy, download. Your code, your disk.
Agent FAQ
Before you
hit run.
How many Atoms does a run cost?
Mode-based: Plan and Explain cost 1, Review and Debug cost 2, full Build costs 3. Your 100 daily Atoms cover ~30 builds a day, free, forever.
What can it build?
Single-file web apps, scripts, converters, utilities, bug fixes — anything that fits in a browser sandbox. Cloud agents for bigger repos are coming.
Do I keep the output?
Every run drops files into the workspace sidebar — click to view, copy, or download. Preview storage lives in your browser tab; accounts bring persistence.
Which models run underneath?
Efficient open models — DeepSeek/Qwen/GLM class — selected in the picker. Frontier models land behind an optional paid plan someday; the free tier never waits on them.
Next
Out of Atoms?
Impossible, it refills.
Pro models
Frontier models are Pro.
Free runs on free models — forever, for everyone. Pro ($12 / 30 days) unlocks Claude/GPT/Gemini-class models and 1,000 Atoms a day, and never touches the free tier.
Cloud deploy
Ship it live.
Live URLs are an account perk — free, no card, works in three minutes.