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First steps
Intro to ClaudeQuickstart
Building with Claude
Features overviewUsing the Messages APIHandling stop reasons
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Extended thinkingAdaptive thinkingEffortTask budgets (beta)Fast mode (beta: research preview)Structured outputsCitationsStreaming MessagesBatch processingSearch resultsStreaming refusalsMultilingual supportEmbeddings
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OverviewHow tool use worksTutorial: Build a tool-using agentDefine toolsHandle tool callsParallel tool useTool Runner (SDK)Strict tool useTool use with prompt cachingServer toolsTroubleshootingWeb search toolWeb fetch toolCode execution toolAdvisor toolMemory toolBash toolComputer use toolText editor tool
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Claude on cloud platforms
Amazon BedrockAmazon Bedrock (legacy)Claude Platform on AWSMicrosoft FoundryVertex AI
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Intro to Claude
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Messages/First steps

Intro to Claude

Claude is a highly performant, trustworthy, and intelligent AI platform built by Anthropic. Claude excels at tasks involving language, reasoning, analysis, coding, and more.

The latest generation of Claude models:

Claude Opus 4.7 - Our most capable model for complex reasoning and agentic coding, with a step-change jump over Claude Opus 4.6. Learn more.

Claude Sonnet 4.6 - Frontier intelligence at scale—built for coding, agents, and enterprise workflows. Learn more.

Claude Haiku 4.5 - Fastest model with near-frontier intelligence. Learn more.

Looking to chat with Claude? Visit claude.ai.

Anthropic offers two ways to build with Claude, each suited to different use cases:

Messages APIClaude Managed Agents
What it isDirect model prompting accessPre-built, configurable agent harness that runs in managed infrastructure
Best forCustom agent loops and fine-grained controlLong-running tasks and asynchronous work
Learn moreMessages API docsClaude Managed Agents docs

Recommended path for new developers

Follow these steps to go from zero to a working Claude integration.

  1. 1

    Make your first API call

    Set up your environment, install an SDK, and send your first message to Claude.

    Go to the quickstart

  2. 2

    Understand the Messages API

    Learn the core request and response structure, including multi-turn conversations, system prompts, and stop reasons.

    Read the Messages API guide

  3. 3

    Choose the right model

    Compare Claude models by capability and cost to pick the best fit for your use case.

    See the models overview

  4. 4

    Explore features and tools

    Discover what Claude can do: extended thinking, web search, file handling, structured outputs, and more.

    Browse the features overview

Develop with Claude

Anthropic provides developer tools to help you build and scale applications with Claude.

Developer Console

Prototype and test prompts in your browser with the Workbench and prompt generator.

API Reference

Explore the full Claude API and client SDK documentation.

Claude Cookbook

Learn with interactive Jupyter notebooks covering PDFs, embeddings, and more.

Key capabilities

Claude can assist with many tasks that involve text, code, and images.

Text and code generation

Summarize text, answer questions, extract data, translate text, and explain and generate code.

Vision

Process and analyze visual input and generate text and code from images.

Support

Help Center

Find answers to frequently asked account and billing questions.

Service Status

Check the status of Anthropic services.

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