Official Anthropic Resources

Claude Opus 4.5

World's best for coding, agents, computer use, and complex enterprise tasks.

Claude Sonnet 4.5

Balanced intelligence, speed, and cost.

Claude Haiku 4.5

Fastest and most cost-effective model.

Anthropic Console

Sign up, get API keys, test prompts, and monitor usage.

Official Documentation

API reference, guides, prompt engineering, tool use, and more.

API Overview & Pricing

Usage-based pricing, prompt caching, web search, computer use, batch processing.

anthropic-sdk-python

Python SDK with async support and type hints.

anthropic-sdk-typescript

TypeScript/JavaScript SDK for Node.js and browsers.

anthropic-sdk-java

Java/Kotlin SDK with modern features.

anthropic-sdk-go

Go SDK with idiomatic design.

anthropic-sdk-php

PHP SDK (beta).

anthropic-sdk-csharp

C#/.NET SDK (beta).

anthropic-sdk-ruby

Ruby SDK.

Claude Agent SDK (Python)

Claude Agent SDK (TypeScript)

Claude Cookbook

Official notebooks and recipes for common patterns.

Claude Quickstarts

Ready-to-deploy example apps.

Amazon Bedrock

Managed access to Claude models in AWS.

Google Cloud Vertex AI Model Garden

Deploy Claude models in Google Cloud.

Microsoft Azure AI Model Catalog

Anthropic models via Azure AI catalog.

Transparency Hub

Safety evaluations and improvements across models.

Claude Opus 4.5 System Card

Capability and safety report (Nov 2025).

Claude Sonnet 4.5 System Card

Evaluations report (Sep 2025).

Claude Haiku 4.5 System Card

Safety and performance report (Oct 2025).