Browser Use

Claude computer use | Browser Harness

Claude computer use,in your browser.

Claude Code works in your Chrome tabs in the background, logged in as you. Your screen stays yours.

Try it in the cloud
PromptPlay one round on OpenGuessr. Inspect the scene, reason from visual clues, submit your best guess, and report the score.

When a tool is missing,
the agent writes it.

  1. agent: wants to pick a date
  2. agent_helpers.py → helper missing
  3. agent writes itagent_helpers.py + pick_date()
  4. date picked

Questions

How is this different from computer use?

Computer use moves the mouse on your screen. Here Claude works directly in a Chrome tab in the background, so you keep using your computer.

What can Claude do with it?

Anything you do in a browser: open pages, click, type, fill forms, read what is on screen, download and upload files. Ask in plain words.

What does it cost?

Nothing. Browser Harness is open source under MIT, and using your own Chrome is free. Cloud browsers are $0.02 per browser-hour if you want them.

You will never use
the browser again.

Try it in the cloud