What can Claude Code do? The most honest answer is a demo, so here are eight. Anthropic's Claude Code, running Claude Opus 5.5, built each of these from a single prompt, testing its own work in a browser along the way, and nobody touched the result. Watch them play, then open any one and use it.
What did Claude Code build in these demos?
One of each of the things developers most often hand an agent.
- A marketing website with a working booking calendar in the hero, a pricing switch and a sign-up flow. 43 minutes.
- An analytics dashboard that computes its figures from a dataset, annotates the revenue peak and supports sorting, filters, search and dark mode. 81 minutes.
- A physics simulation of twenty balls in a spinning hexagon, written from scratch. 40 minutes.
- A 3D shooter in three.js, a neon city with waves, reloading and a minimap. It used the full 150 minutes.
- A phone finance app with a send-money flow, haptic feedback and a full-screen confirmation. 69 minutes.
- A one-lane MOBA called Riftline, with minions, towers, a shop, an AI enemy hero called Vexis and four abilities on Q W E R. It used the full 150 minutes.
- A website for a product it invented: a sleeper train that loops through the night, with sound. 74 minutes.
- A kanban board with drag and drop, undo, filters, a details panel that saves automatically and a dark mode. 101 minutes.
How does Claude Code do it?
By working like a developer with a browser open. Claude Code reads your files, edits them and runs commands in your terminal, and in our runs it repeatedly started a local server, loaded its work in a headless browser, looked at what rendered and fixed it. On the shooter alone, Opus 5.5 issued 118 shell commands. The command we used is on the methodology page.
What can't Claude Code do, on this evidence?
Hurry. Its builds took 40 minutes to two and a half hours at maximum effort, and it used every one of our 150 minutes on the two most complex games. It also stops at the code you asked for: these projects have no real backend, accounts or payments, because the briefs asked for front ends. And it is token-hungry, so long sessions on a subscription meet usage limits; several of our runs needed a fresh attempt after one.
How do you try Claude Code yourself?
Install it, give it one of our prompts, and compare your result with these. Claude Code comes with Claude Pro, from $17 a month billed annually per Claude's pricing page, and runs in a terminal, VS Code, JetBrains, a desktop app or the browser. Every brief page has its prompt with a copy button; the Claude Code examples page walks through what each prompt asked for and what came back.
Four shooters, one by Claude Code with Opus 5.5. Can you pick it out?
Take the blind test
Frequently asked questions
What can Claude Code do?
Claude Code is Anthropic's coding agent: it reads your codebase, edits files, runs commands and checks its work. From one prompt each, it built eight working projects for us with Claude Opus 5.5, from a marketing site to a 3D game, testing each in a browser as it went.
What can't Claude Code do?
On its own, it does not deploy, buy domains or connect real payment and account systems unless you set those up and give it access. It is also slow on big builds: our largest took the full 150 minutes we allow.
Is there a Claude Code demo I can try?
Every build on this page is live; open one to use exactly what Claude Code produced. To see Claude Code work, copy a prompt from any brief page and run it yourself.
Does Claude Code work in VS Code?
Yes. Anthropic documents Claude Code for the terminal, VS Code and JetBrains, a desktop app and the web.