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Claude Code: Anthropic's AI Coding Agent Explained
Claude Code is Anthropic's coding agent. It reads your codebase, edits files, runs commands and plugs into your existing tools, from the terminal, your editor, a desktop app or the browser.
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Facts checked against official announcements and documentation, October 2026 · Last updated October 2026
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01 · Basics
What Claude Code is
Claude Code works on whole projects, not single snippets.
What is Claude Code?
An agentic coding tool from Anthropic that reads your codebase, edits files, runs commands and integrates with your development tools. You describe what you want in plain language; it plans the approach, writes code across files and verifies it works.
Source: Claude Code Docs: Overview
Where can I use Claude Code?
In the terminal (CLI), in VS Code and JetBrains via extensions, in a standalone desktop app, and on the web for long-running cloud tasks. Sessions can move between surfaces.
Source: Claude Code Docs: Overview
What can Claude Code do?
Build features and fix bugs, write tests, fix lint errors, resolve merge conflicts, update dependencies, write release notes, review code in CI through GitHub Actions or GitLab, run scheduled tasks, and coordinate multiple agents in parallel.
Source: Claude Code Docs: Overview
02 · Cost
Claude Code pricing
Claude Code comes with paid Claude plans; there is no free tier for it.
Is Claude Code free?
No. Claude's Free plan does not include Claude Code. The cheapest option is Pro at $20 a month, or $17 a month billed annually.
Source: Claude: Plans and pricing
Which Claude plans include Claude Code?
Pro ($20 a month), Max (from $100 a month), Team (Standard seats $25 monthly or $20 annually; Premium seats $125 or $100) and Enterprise. Developers can also use an Anthropic Console account billed at API rates.
Source: Claude: Plans and pricing; Claude Code Docs: Overview
Claude Code vs Codex: which costs less?
OpenAI's Codex is included on every ChatGPT plan, including Free, while Claude Code starts at $20 a month. Heavy users on either should compare usage limits on the plan they would actually buy.
Source: Claude: Plans and pricing; OpenAI Help: Using Codex with your ChatGPT plan
03 · Setup
Installing and configuring Claude Code
Setup takes a few minutes; a good CLAUDE.md file makes the biggest difference to results.
How do I install Claude Code?
Follow the native install command for your system in Anthropic's docs (a one-line script on macOS, Linux and WSL, PowerShell or CMD on Windows; Homebrew and WinGet are also supported), then run claude in your project folder and sign in.
Source: Claude Code Docs: Overview
What is CLAUDE.md?
A markdown file in your project root that Claude Code reads at the start of every session. Use it for coding standards, architecture decisions, preferred libraries and review checklists. Claude Code can also read an existing AGENTS.md.
Source: Claude Code Docs: Overview
What is MCP in Claude Code?
The Model Context Protocol is an open standard for connecting AI tools to external data. With MCP servers, Claude Code can read design docs in Google Drive, update Jira tickets, pull from Slack or use your own tools.
Source: Claude Code Docs: Overview
Sources
Read and checked October 2026. Policies change, so confirm anything time-sensitive on the source page.