Grok Build

Grok Build is SpaceXSI's coding agent. It runs in the terminal as a fullscreen text interface. It reads your codebase, edits files, runs shell commands, searches the web and manages long-running tasks. It also runs headlessly in scripts and CI/CD pipelines, or inside other apps through the Agent Client Protocol (ACP). It has plan mode, subagents in their own git worktrees, skills, plugins, hooks, MCP servers and AGENTS.md files.

Since 21 September 2026 it is powered by Grok 4.7, and you can add any custom model. It installs with one command on macOS, Linux, WSL and Windows. The source code is on GitHub (xai-org/grok-build), written in Rust, under the Apache 2.0 licence.

It is part of The X Subscription, one plan for Grok, Cursor and X (USD per month, before tax): Free $0 (limited use), Plus $8, Premium $30, Super $100, Ultra $200, Teams from $30 per user, Enterprise custom. Grok and Cursor share one weekly usage pool. You can also sign in with an xAI API key.

Made for

Developers who want a coding agent in their terminal, for any codebase and any language, from single users to teams and enterprises. It also serves people who script coding tasks in CI/CD pipelines.

Use cases

• Ask questions about a codebase and walk through files
• Plan multi-file changes and approve them before edits
• Run builds and tests from the terminal
• Run parallel subagents in separate git worktrees
• Script coding tasks in CI/CD with headless mode
• Connect Linear, Sentry or Postgres through MCP servers

An alternative to

• Claude Code

  Open source under Apache 2.0, and included in X Subscription plans from $8 a month.

• OpenAI Codex

  Uses xAI's Grok models and shares one weekly usage pool with Cursor in the X Subscription.