Claude

Claude is an AI assistant made by Anthropic, an AI safety and research company. People use Claude to write and edit, analyse documents and data, research topics, write and review code, and work through complex problems in conversation, on the web, desktop and mobile apps. Anthropic was founded by former OpenAI researchers with a focus on AI safety, and that emphasis shapes how it describes Claude's development, including its constitutional approach to training models to be helpful, honest and harmless. Claude has developed a reputation for strong writing quality, careful reasoning and the ability to work with long documents, since its models support very large context windows that can take in entire reports, contracts or codebases at once. The product includes features for sustained work. Projects group conversations with shared files and instructions, artifacts display documents, code and interactive content alongside the chat so users can iterate on them, and research features search the web and compile sourced answers. Claude can connect to tools and data sources through integrations, including the open Model Context Protocol that Anthropic introduced, which lets AI applications connect to external systems. Claude Code is a command-line and IDE tool that lets developers delegate programming tasks to Claude in their own environment, and it has become widely used among software engineers. Claude has a free tier and paid individual plans with higher usage limits and access to more capable models, plus Team and Enterprise plans with administration and data controls. Developers and businesses access Claude models through Anthropic's API and through major cloud platforms. Like all language-model assistants, Claude can make mistakes, including stating incorrect information confidently, so important outputs should be verified. Usage limits on plans are a common consideration for heavy users. Alternatives include ChatGPT from OpenAI, the most widely used assistant; Google Gemini, integrated with Google Workspace; Microsoft Copilot for Microsoft 365; Perplexity for search-focused answers; GitHub Copilot and Cursor for coding; and Mistral's Le Chat. Choose Claude when you want an assistant suited to long documents, careful writing and coding work.