Claude, made by Anthropic, is an AI assistant known for careful reasoning, natural writing, and strong coding ability. Its large context window lets you paste long documents, codebases, or research and get grounded, well-structured answers.
Claude is popular with writers, analysts, and developers who want a reliable second brain for drafting, summarizing, and problem-solving. It is available on the web and mobile, with an API and Claude Code for developers who want AI directly in their terminal.