Claude.ai
Anthropic's consumer and business web interface for Claude at claude.ai — where most people access Claude without writing code. Features include: Projects (persistent workspaces with custom instructions and files), Connectors (links to Google Drive, Dropbox, Notion, etc.), Skills (built-in capabilities like web search and code execution), and Cowork (Claude controlling your computer to do tasks). Distinct from the Claude API, which developers use to build their own applications.
In practice
Claude.ai is the website and app where you talk to Claude directly — like Gmail is where you read your email. You go there, type a question, and get an answer. It's distinct from the API, which is for developers building their own apps powered by Claude. Most non-developer users interact with Claude through Claude.ai.