Anthropic

Claude Opus 4.6 is Anthropic's flagship frontier language model, featuring a 1 million token context window now generally available at flat pricing. It is designed for complex reasoning, long-document analysis, and advanced agentic tasks, scoring 78.3% on the MRCR v2 long-context retrieval benchmark. It is accessible via Anthropic's API at $5 per million input tokens and $25 per million output tokens.

Claude Code is Anthropic's agentic AI coding tool that operates directly in the terminal and integrates with IDEs, enabling developers to delegate complex coding tasks to an AI agent. It can autonomously write, edit, and refactor code across multiple files, run tests, execute shell commands, manage git operations, and navigate entire codebases. With support for up to 1M token context on Max, Team, and Enterprise plans (on Opus 4.6), it is purpose-built for large-scale software engineering workflows.

Claude Sonnet 4.6 is Anthropic's mid-tier large language model in the Claude 4 generation, offering a 1 million token context window at generally available flat pricing of $3 per million input tokens and $15 per million output tokens. It is designed to balance high capability with cost-efficiency, supporting a broad range of tasks including coding, analysis, writing, summarization, and long-context document processing. The model sits between Haiku (lightweight) and Opus (highest capability) in Anthropic's model family lineup.

Model Context Protocol (MCP) is an open standard for connecting AI applications and agents to external tools, data sources, and workflows via a client-server architecture. Using JSON-RPC 2.0 over stdio or Streamable HTTP transports, it defines primitives for Tools, Resources, and Prompts that any MCP-compatible host (Claude, ChatGPT, Cursor, VS Code Copilot, and more) can discover and invoke. Originally created by Anthropic and launched in November 2024, it was donated to the Linux Foundation's Agentic AI Foundation (AAIF) in December 2025 and has grown to 500+ public servers and 97M+ monthly SDK downloads.

Claude Desktop is Anthropic's official native desktop application for macOS and Windows that brings Claude AI beyond the browser with deeper OS-level integrations. It acts as an MCP (Model Context Protocol) client, allowing users to connect Claude to local tools, files, APIs, and third-party services via configurable MCP servers. It also supports computer use (in beta), enabling Claude to autonomously interact with the desktop environment on the user's behalf.