Model cards Detailed documentation of Claude Opus 4.7. Detailed documentation of Claude Sonnet 4.6. Detailed documentation of Claude Opus 4.5. Detailed documentation of Claude Haiku 4.5. Detailed documentation of Claude Sonnet 4.5. Detailed documentation of Claude Opus 4.1. Detailed documentation of Claude 4 models. System card for Claude Sonnet 3.7 with performance and safety details. Detailed documentation of Claude 3 models including latest 3.5 addendum. Learning resources Deployable applications built with the API. Step by step lessons on building with Claude. Replicable code samples and implementations. In-depth production guides for building common use cases with Claude. Key terms and concepts for working with Claude and language models. Resources for AI ingestion Concise API guide meant for ingestion by Claude. Concise overview of Claude API documentation, optimized for LLM ingestion. LLM-optimized documentation index.