Claude Manual

What Is Claude? — The Big Picture

"I keep hearing about AI, but where do I start?" "I've heard of ChatGPT — how is Claude different?"

This page is for you. By the end, you'll understand the big picture of Claude and know exactly what to try first.

Claude Is an AI Assistant Built for Safety

Claude is an AI assistant developed by Anthropic. It handles a wide range of tasks: writing documents, answering questions, analyzing data, helping with code, and much more.

Like ChatGPT (by OpenAI) and Gemini (by Google), Claude is built on "large language model" (LLM) technology. But Claude stands out in several ways:

  • Safety-first design — Anthropic was founded to develop AI safely. Claude is carefully designed to avoid harmful responses
  • Excellent with long documents — Claude can process up to 1 million tokens (roughly 750,000 English words — about 10 full novels) in a single conversation
  • An agent that gets things done — Beyond just answering questions, Claude can edit files, run code, and take real action as an "agent"

New to AI? Don't worry about terms like "LLM" or "tokens." The key takeaway is: Claude is a smart AI assistant that can help with many different tasks.

The Claude Product Family — Use It Anywhere

Claude isn't a single app. It's available as multiple products tailored to different use cases. Think of it as the same AI "brain" accessible in various ways.

ProductWhere?Best For
Claude Web (claude.ai)BrowserAnyone who wants to try it right now. No installation needed
Claude DesktopMac / Windows appDaily users who want deeper PC integration
Claude MobileiPhone / AndroidPeople on the go. Quick questions and voice input
Claude CodeTerminal / IDEEngineers and developers. AI-powered coding agent

Claude Web (claude.ai) — Start Here

Just go to claude.ai in your browser. Create a free account and start using it immediately.

Key features:

  • Chat — Type a question or request, and Claude responds
  • File uploads — Upload PDFs, images, and other files for Claude to analyze
  • Artifacts — Claude can generate documents and code with live previews. For example, ask "Summarize these meeting notes," and a formatted document appears that you can copy or download
  • Projects — Save frequently used documents and instructions so Claude references them automatically in every conversation
  • Deep Research — Delegate complex research tasks to Claude. It searches multiple sources and compiles a comprehensive report
  • Connectors — Connect 150+ external services like Microsoft 365 (Outlook, OneDrive, SharePoint), Slack, and GitHub. Even available on the free plan

Claude Desktop — Deep PC Integration

A desktop app for Mac and Windows. It has all the same chat features as the web version, plus deeper integration with your computer.

  • Cowork mode — Claude works on tasks in the background while you focus on other things. For example, ask it to summarize a 30-page PDF and move on to your next task
  • MCP (Model Context Protocol) — Connect external services like Google Drive and Slack directly to Claude

Claude Mobile — Anywhere, Anytime

The iPhone/Android app lets you consult Claude on the go. Voice input is supported, so you can organize ideas while walking.

Claude Code — An Engineer's Power Tool

An AI assistant that runs in your terminal or IDE (VS Code, JetBrains, etc.). Give instructions in plain English to write code, run tests, manage Git, and more — all automatically.

Not an engineer? Claude Code requires programming knowledge. Start with Claude Web or Claude Desktop instead. This site also has guides for non-engineers who want to try Claude Code.

Choosing the Right Claude for You

Not sure where to start? Here are recommendations based on what you want to do.

"I just want to try AI"

Recommended: Claude Web (claude.ai)

Create an account and open it in your browser. No installation, no cost. Try things like:

  • "Create an agenda for next week's meeting"
  • "Rewrite this paragraph in a more formal tone"
  • "Explain [topic] in simple terms"

Office & Administrative Professionals

Recommended: Claude Web → Claude Desktop

Great for daily document creation, data organization, and email drafting. Once comfortable, try Desktop's Cowork mode for larger tasks like report generation.

  • Summarizing meeting notes, creating reports
  • Analyzing spreadsheet data
  • Creating manuals and procedures

Sales & Marketing Professionals

Recommended: Claude Web + Claude Mobile

Draft proposals on your desktop with Claude Web, organize ideas on the go with the mobile app. Save product info and past proposals in Projects for consistent output.

  • Drafting proposals and plans
  • Creating competitive analysis reports
  • Writing client-facing emails

Executives & Management

Recommended: Claude Web (Deep Research) → Claude Desktop (Cowork)

Deep Research is ideal for market analysis and report synthesis. Claude processes large volumes of information so you can focus on decision-making. For team deployment, consider the Team plan.

  • Market research and competitive analysis
  • Interpreting financial reports
  • Reviewing strategic documents

Engineers & Developers

Recommended: Claude Code

Claude Code works directly in your terminal or IDE. Write, review, debug, and refactor code using natural language. It handles Git operations and test execution too.

  • Writing and modifying code
  • Investigating and fixing bugs
  • Creating pull requests

Pricing Overview

Claude offers several plans to match your needs and usage level.

Note: Pricing may change. Check the official Anthropic pricing page for the latest information.

PlanMonthly PriceKey Points
FreeFreeCore features included. Start here. Limited messages
Pro$20/mo5x the Free plan usage. Claude Code and Cowork available
Max 5x$100/mo5x Pro usage. For heavy users
Max 20x$200/mo20x Pro usage. Top-priority access
TeamFrom $25/seat/moFor team use. Admin features and member management (5+ seats)
EnterpriseContact salesFor large organizations. Advanced security and management

Start with the free plan, and upgrade to Pro when you want more. At $20/month, Pro provides enough capacity for most daily work needs.

Tip: Free plan users often hit the daily message limit quickly. If you find yourself waiting for limits to reset regularly, it's time to consider Pro.

For a detailed plan comparison, see "Claude Pricing Plans Compared."

Next Steps — Start Here

Choose your next article based on your interests:

Want to try Claude Web? (Recommended for everyone):

Want to try Claude Desktop?

Want to try Claude Code? (For engineers):

Want to learn how to write better prompts?

Want to compare pricing plans?

Want to Learn More? The AI Models Behind Claude

About Claude's AI models (click to expand)

Claude offers three model tiers for different use cases. You don't need to think about this most of the time, but it's useful to know.

ModelCharacteristicsBest For
OpusMost powerfulComplex analysis, advanced reasoning, long tasks
SonnetBalancedEveryday tasks. Good balance of speed and capability
HaikuFastest, lowest costSimple questions, quick responses

Free plan users get access to Sonnet, while Pro and higher plans unlock all models including Opus. Normally, Claude automatically selects the best model for your task, so you don't need to worry about choosing.