What Claude Code Is

Claude Code launched on April 22, 2025 as an agentic coding tool accessible through a terminal interface (npm install -g @anthropic-ai/claude-code). Unlike AI code editors that work within a specific IDE, Claude Code operates at the system level — it can read any file on the filesystem, execute bash commands, run test suites, install packages, and commit to git. It is a full software engineering agent, not an autocomplete assistant.

The underlying model is Claude 3.7 Sonnet, whose 62.3% SWE-bench score made it the obvious choice for complex software engineering tasks. Claude Code adds a tool layer on top — allowing the model to read files, write files, execute commands, and search the web — transforming the model's raw intelligence into executable actions.

Core Workflow

A typical Claude Code workflow: the developer navigates to a project directory and types a natural language instruction such as "Add user authentication to this Express app using JWT, following the existing code style." Claude Code then reads the existing codebase to understand structure, generates the required files and modifications, runs the existing tests to check nothing is broken, and presents a summary of changes for the developer to review and approve. The developer can accept all changes, modify specific files, or ask Claude Code to revise its approach.

Safety and Control

Anthropic built a permission system into Claude Code that requires explicit user approval before any destructive action — file deletion, package installation, or commands that modify system state outside the project directory. A "Verbose" mode shows every action Claude Code is taking in real time, and an "Autorun" mode (disabled by default) allows fully autonomous execution for trusted workflows.

Pricing

Claude Code bills through the standard Anthropic API at Claude 3.7 Sonnet rates ($3.00/million input, $15.00/million output tokens). A typical feature implementation session consumes 50,000-200,000 tokens, costing $0.15-$0.60 per task — significantly less than an hour of developer time for most markets.

What This Means for Indian Businesses

Claude Code is immediately relevant to India's 5+ million software developers. Unlike GitHub Copilot which suggests completions within an IDE, Claude Code operates as a full autonomous coding agent — it can read an entire codebase, understand the architecture, implement a new feature, write tests, and verify the tests pass, all from a single natural language instruction. For Indian freelancers and software agencies, this is a force multiplier that can double effective output per developer.