Claude Code

Claude Code is Anthropic's command-line coding agent, powered by Claude Sonnet and Opus models. It runs in your terminal, reads your entire codebase, and makes changes across multiple files in a single session. Unlike IDE-based copilots, Claude Code follows a Unix philosophy: it operates as a CLI tool that composes with your existing workflow — git, shell, build tools, and test runners.

The core loop is: understand the codebase, plan changes, edit files, run verification (tests, linting, type checking), and iterate. It supports MCP (Model Context Protocol) for connecting to external tools and data sources, has persistent memory via CLAUDE.md files, and can manage complex multi-step tasks like feature implementation, refactoring, and bug fixing.

Claude Code is available as part of Claude Pro ($20/month) and Max subscriptions, and as a standalone CLI. It's source-available on GitHub. With 46% developer favorability (vs 19% for Cursor), it has the highest satisfaction rating in the coding agent category and reached $2.5B+ in annualized revenue within 10 months of launch.

Claude Code is strongest for complex, multi-file changes where understanding the full codebase context matters. It excels at refactoring, implementing features across multiple files, debugging with full stack context, and managing git workflows. The CLI-first approach means it integrates naturally into terminal-heavy workflows.

Limitations: it only uses Claude models (no model switching), requires a subscription, and the terminal interface has a learning curve compared to GUI-based tools like Cursor. It's not ideal for visual tasks (UI design, layout tweaking) where an IDE provides better feedback. The MCP ecosystem is growing but still smaller than Cursor's extension marketplace.

Best for developers who spend most of their time in the terminal and want an agent that can take autonomous action on their codebase with human oversight. Not ideal for developers who prefer a visual IDE experience or need multi-model flexibility.