Claude is Anthropic’s AI assistant, designed with a focus on safety, honesty, and helpfulness. It excels at nuanced reasoning, careful analysis, and working with very long documents — its context window can handle entire codebases, lengthy reports, or book-length material in a single conversation. Claude is widely used for research, writing, coding, and complex problem-solving, and is available via claude.ai as well as the Anthropic API for developers building AI-powered applications.