Claude is a large language model (LLM) developed by Anthropic, a company founded by former OpenAI senior staff. It's considered one of the best models in the world, especially for writing, long-document analysis and working with code.
What makes Claude unique?
- Huge context window — 200K tokens (around 500 pages) in the standard tier, up to 1M in Enterprise. Analyze entire books, legal contracts and full codebases in a single conversation.
- Constitutional AI — a unique training approach focused on safety and explainability. Claude refuses with explanation and offers alternatives.
- High writing quality — widely considered the best model for long-form text, creative writing and editing.
- Claude Code — a CLI tool for development with Claude, capable of reading and writing files, running commands and performing complex dev tasks.
- Computer Use — ability to navigate a computer, click and fill in forms like a person.
- MCP (Model Context Protocol) — an open protocol that lets Claude communicate with external tools and systems.
Claude is available via claude.ai (the regular interface), the Anthropic API (for developers), AWS Bedrock and Google Cloud Vertex AI (Enterprise plans).
Current models: Claude Opus 4.7 (the strongest and newest), Claude Sonnet 4.6 (a balance of speed and quality), and Claude Haiku 4.5 (cheap and fast). All models also support images, PDFs and multimodal reasoning.
On this site: Claude is the model working with you right now. Every piece of text, improvement and design on this site has gone through Claude Code.
