Model cards
Claude 3 Model Card
Detailed documentation of Claude 3 models including latest 3.5 addendum.
Claude Sonnet 3.7 System Card
System card for Claude Sonnet 3.7 with performance and safety details.
Claude 4 System Card
Detailed documentation of Claude 4 models.
Claude Opus 4.1 System Card
Detailed documentation of Claude Opus 4.1.
Claude Sonnet 4.5 System Card
Detailed documentation of Claude Sonnet 4.5.
Claude Haiku 4.5 System Card
Detailed documentation of Claude Haiku 4.5.
Learning resources
Quickstarts
Deployable applications built with our API.
Courses
Step by step lessons on building with Claude.
Cookbook
Replicable code samples and implementations.
Prompt library
Explore optimized prompts for a breadth of business and personal tasks.
Use case guides
In-depth production guides for building common use cases with Claude.
Glossary
Key terms and concepts for working with Claude and language models.
Resources for AI ingestion
API primer for Claude ingestion
Concise API guide meant for ingestion by Claude.
Claude API Docs Overview
Concise overview of Claude API documentation, optimized for LLM ingestion.
llms.txt
LLM-optimized documentation index.
llms-full.txt
Complete LLM-optimized documentation.