What Claude is and where things live

• Claude is an AI assistant made by Anthropic. You type a message, called a prompt, and Claude replies. People use it to draft, summarize, analyze documents and think through problems.
• Free, Pro, Max and Ultra are personal plans. Team and Enterprise are organization plans, and their chats are not used to train models by default.
• Sign in at claude.ai with Continue with Google or Continue with email, which sends you a login link. If your company uses single sign-on (SSO), you sign in through your company's login page.
• If you have a personal account too, click your initials or name in the lower left corner to switch between it and your organization.
• The sidebar has New chat, Search, Projects and Recents, your past chats. The + button in the message box adds files and tools.