Claude by Anthropic

Anthropic PBC · Productivity
Claude is Anthropic's AI assistant, trusted for thoughtful writing, careful reasoning, and elite-level coding. Powered by the Claude Opus and Sonnet model family with industry-leading long-context windows, it handles entire codebases, lengthy contracts, and book-length documents in a single conversation. Projects organize related chats with shared knowledge, while Artifacts render code, diagrams, and interactive previews side-by-side as you work. The mobile app supports voice mode, file uploads, and computer-use-style agent tasks. Free, Pro, Max, and Team tiers scale message limits, unlock advanced models, and add priority bandwidth — making Claude a popular choice for professionals, researchers, and developers.$7b