xAI · 2026-05-14 · major
Grok Build — xAI's CLI Coding Agent Runs 8 Parallel Subagents With Plan Mode, Worktree Integration, and Local-First Privacy
Early beta of xAI's terminal coding agent for SuperGrok Heavy. Spawns up to eight specialized subagents in parallel, supports plan mode with step-by-step edits, and integrates with git worktrees. Powered by grok-code-fast-1.
xAI launches a CLI coding agent that splits work across eight concurrent subagents and lands diffs through plan mode.
Key specs
| Concurrent agents | up to 8 |
|---|---|
| Underlying model | grok-code-fast-1 |
| Access | SuperGrok Heavy beta |
What is it?
Grok Build is xAI's new terminal-based coding agent, designed for professional software engineering. It runs locally as a CLI, takes high-level tasks, and breaks them across parallel subagents that plan, search docs, and write code together. The early beta is gated to SuperGrok Heavy subscribers.
How does it work?
For complex tasks, Grok Build enters plan mode: it lays out a multi-step plan that the user can approve, comment on, or rewrite before any code is touched. Once approved, edits arrive as clean diffs. Larger jobs are split across specialized subagents that can run in their own git worktrees in parallel. The agent stack is powered by grok-code-fast-1, xAI's agentic coding model.
Why does it matter?
This is xAI's direct shot at Claude Code, Codex CLI, and Gemini CLI — but instead of one sequential agent, Grok Build runs up to eight in parallel. Local-first execution keeps source code, credentials, and project data on the developer's machine. For SuperGrok Heavy subscribers it adds a serious tool to the coding-agent shortlist.
Who is it for?
Software engineers and SuperGrok Heavy subscribers comparing CLI coding agents
Try it
npm install -g grok-build && grok-build init