What is Claude and how does it work? Claude is an artificial intelligence, trained by Anthropic using Constitutional AI to be safe, accurate, and secure — the trusted assistant for you to do your best work.

Sign in to Claude, Anthropic's AI assistant for problem solvers.

Claude is Anthropic's AI, built for problem solvers. Tackle complex challenges, analyze data, write code, and think through your hardest work.

Claude in Chrome is included as a connector and is ready to use when you enable it. Turn it on in any conversation and Claude can navigate, click, and fill forms in your browser from the Desktop app. Start a task without switching windows.

Build on the Claude Platform Create agents and applications with frontier Claude models and managed agent infrastructure.

Claude Science is a customizable app that integrates the tools and packages researchers most often use, produces auditable artifacts, and provides flexible access to computing resources. At Anthropic, we build AI to serve humanity’s long-term well-being.

Claude was released as an AI -based chatbot in March 2023. It is also used in AI-assisted software development. Claude is trained using a constitution, a technique developed by Anthropic to improve ethical and legal compliance.

When you open Claude on a web browser (claude.ai), the desktop app, or a mobile app, you will see two different options for logging in to your Claude account.

What is Claude? Claude is a large language model (LLM) built by Anthropic. It's trained to be a helpful, honest, and harmless assistant with a conversational tone.

We’re offering two versions of Claude today: Claude and Claude Instant. Claude is a state-of-the-art high-performance model, while Claude Instant is a lighter, less expensive, and much faster option.