Claude AI Tutorial

In Article 17, you learned the theory of RAG. Now we build a complete document Q&A system. Upload PDF documents, ask questions in natural language, and get answers with citations pointing back to the source. This is Article 22 in the Claude AI — From Zero to Power User series. You should know RAG and Vision before this article. Architecture Upload PDF → Parse → Chunk → Embed → Store in Vector DB ↓ Question → Embed → Search → Top Chunks → Claude → Cited Answer The system has two pipelines: ...

The difference between a bad prompt and a good prompt is the difference between a useless answer and a perfect one. Prompt engineering is how you tell Claude exactly what you want — and get it. This is Article 5 in the Claude AI — From Zero to Power User series. You should have completed Article 2: Getting Started before this article. By the end of this article, you will know five practical techniques for writing better prompts. ...

Claude is not one model. It is a family of models, each designed for different tasks and budgets. Choosing the right model can save you money and get you better results. This is Article 4 in the Claude AI — From Zero to Power User series. You should have completed Article 2: Getting Started before this article. By the end of this article, you will know exactly when to use Opus, Sonnet, and Haiku. ...

Claude Code is a terminal-native AI coding assistant. It lives in your terminal, reads your codebase, edits files, and runs commands. No IDE plugin needed. No browser tab. Just your terminal. This is Article 3 in the Claude AI — From Zero to Power User series. If you are new to Claude, start with Article 1: What is Claude?. By the end of this article, you will have Claude Code installed, configured, and ready to use on your projects. ...

You want to build something with Claude. Great. In this article, you will create an Anthropic account, get an API key, install the SDK, and make your first API call — in both Python and TypeScript. This is Article 2 in the Claude AI — From Zero to Power User series. If you are new to Claude, start with Article 1: What is Claude?. By the end of this article, you will have a working Claude API setup and understand how tokens, pricing, and error handling work. ...

Claude is an AI assistant built by Anthropic. It can write code, analyze documents, reason through complex problems, and use tools. Many developers now use Claude as their primary AI coding tool. But what exactly is Claude? How is it different from ChatGPT or Gemini? And why should you care as a developer? This article answers those questions. It is the first article in our Claude AI — From Zero to Power User tutorial series. By the end of this series, you will know how to use Claude’s API, build agents, and work with advanced features like tool use and the Model Context Protocol (MCP). ...

The Vercel AI SDK is the most popular way to use Claude in web applications. It handles streaming, tool use, and UI state — all with a few lines of code. In this article, you will build a complete chat application with Claude, Next.js, and the Vercel AI SDK. This is Article 27 in the Claude AI — From Zero to Power User series. This is the final article in the series. You should know the Messages API and Tool Use before this article. ...

Everything you need to use Claude in one page. Bookmark this. Come back whenever you need a quick reference for models, APIs, pricing, or code snippets. This is Article 26 in the Claude AI — From Zero to Power User series. Models (March 2026) Model ID Context Max Output Input (per 1M) Output (per 1M) Opus 4.6 claude-opus-4-6 200K 32K $5.00 $25.00 Sonnet 4.6 claude-sonnet-4-6 200K 16K $3.00 $15.00 Haiku 4.5 claude-haiku-4-5 200K 8K $1.00 $5.00 1M Context (Beta): Available for Opus 4.6 and Sonnet 4.6 on Tier 4+ accounts. Requires header: anthropic-beta: interleaved-thinking-2025-05-14. Premium pricing applies above 200K tokens. ...

Claude API costs add up fast if you are not careful. A simple change like enabling prompt caching can cut your bill by 90%. Using the Batch API saves 50%. Stack them together and you save up to 95%. This is Article 25 in the Claude AI — From Zero to Power User series. You should know Understanding Models and Extended Thinking before this article. The Cost Equation Your Claude API cost is determined by three factors: ...

Manual code reviews are slow. Pull requests wait hours or days for feedback. In this article, you will set up Claude to automatically review every PR in your GitHub repository, post comments on issues it finds, and approve clean code — all inside GitHub Actions. This is Article 24 in the Claude AI — From Zero to Power User series. You should know Build a Code Review Bot before this article. ...