Claude Code
Anthropic's agent that works on your computer instead of in a chat window. Give it a task and it reads, edits, and creates files, runs commands, and keeps going until done, asking before risky steps. It runs in the terminal, in code editors, as a desktop app, and on the web, with a Claude subscription.
In plain English
Anthropic’s Claude chat app answers questions. Claude Code opens your folder and does the work: renames the files, fixes the spreadsheet formula, builds the little website. It asks before it does anything risky.1
In the real world
- A terminal window, the text-only command window, with a blinking cursor. That’s where most people first meet it.
- The web version, where you give it a task and come back later.
- The 2025 holiday wave of non-programmers building apps with it.2
When to use it
- Tasks on your actual files. Reorganize, rename, convert, clean up.
- Building a small tool you’d never pay a developer for.
- Repeating work you can describe in a paragraph.
When not to use it
- Quick questions. Use the chat app.
- Anything on a computer with files you can’t afford to have touched. Work in a copy.
Good, bad, ugly
- Good: the gap between “I wish I had a tool for this” and having one is now an afternoon.
- Bad: the terminal is intimidating, and the first hour is confusing.
- Ugly: it will cheerfully build the wrong thing fast if the brief was vague. See vibe coding.
Key facts
- Made by
- Anthropic
- Runs in
- The terminal, inside code editors, a desktop app, and the web
- Who uses it
- Developers first. Since late 2025, a lot of non-programmers too.
Common questions
Do I need to be a programmer to use Claude Code?
No, but it helps to be comfortable with files and folders. It went viral over the 2025 holidays partly because non-programmers used it to build things by describing them.
How is it different from the Claude chat app?
The chat app talks. Claude Code acts: it reads and edits files on your machine, runs commands, and keeps going until the task is done, asking permission along the way.
What does it cost?
It's included with Claude subscriptions and also runs on API billing. Check Anthropic's current plans; this changes.
References
- Claude Code overviewAnthropic, Claude Code DocsView source
- Claude CodeWikipediaView source