Grok Build
xAI · Coding
Grok Build is xAI's terminal-native coding agent, a command-line tool that reads your project, plans multi-step engineering work, and executes it without leaving the shell. It runs inside a fullscreen terminal interface, splits large jobs across parallel subagents, and extends through skills, plugins, hooks, and MCP servers. It suits developers who already live in a terminal and want an agent that works where they do.
About Grok Build
What Is Grok Build
Grok Build is xAI's coding agent that lives in your terminal rather than a browser tab. You point it at a project directory, describe what you want, and it plans the work, edits files, runs tests, and helps you commit the result. It's closer to a resident engineer than to a code-completion plugin.
The tool targets real production work: understanding a codebase, breaking a feature into steps, running commands, and juggling several tasks at once. It handles interactive sessions through a fullscreen TUI, and it also runs headless so you can drop it into scripts, bots, and CI/CD pipelines. Teams that already use Claude Code or Aider will recognize the shape of the product, but Grok Build pushes its own architecture and extension model.
The biggest limitation is access. During its beta, Grok Build was tied to the SuperGrok Heavy subscription, and it works best when paired with a real project and a working knowledge of Git. If you don't have a terminal habit or you need a no-setup experience, this isn't the tool for you yet.
Getting Started
- Install the CLI with the official one-line script:
curl -fsSL https://x.ai/cli/install.sh | bash. - Sign in with your xAI account so the agent can reach the Grok models.
- Move into the project you want to work on with
cd your-project. - Launch the agent by running
grok, then describe the task in plain language. - Review the plan, approve the changes, and check the inline diffs before you commit.
Product Information
A quick look at Grok Build's pricing, supported platforms, and performance.
Best for
The users, tasks, and scenarios where this tool fits best.
Users
- Professional software engineers who work in a terminal all day and want an agent that touches real project files, commits, and CI.
- Developers already running Claude Code or Aider who want a second terminal AI coding tool to compare plans and costs.
- Backend and infrastructure teams that need headless automation, since Grok Build slots into scripts and pipelines without a UI.
Tasks
- Refactoring across multiple files
- Debugging with test runs
- Long, multi-step features
Scenarios
- Exploring an unfamiliar codebase
- Wiring an agent into CI/CD
- Automating routine maintenance like dependency bumps, which you review as a diff rather than a merge conflict.
Key features
Plan Mode
Plan Mode makes Grok Build lay out its approach before it writes a line of code. You get a step-by-step plan you can read, edit, or rewrite, then approve for execution. That review step matters when a task touches sensitive files and you'd rather catch a bad idea before it ships.
Parallel Subagents
For bigger jobs, the agent splits work across subagents that run at the same time. It uses Git worktree isolation so each subagent works in its own copy, which keeps concurrent edits from stepping on each other. You can plausibly run five or more agents at once and switch between their plan views.
Fullscreen Terminal Interface
Grok Build renders a fullscreen TUI built on ratatui, with syntax highlighting, Markdown, and inline Mermaid diagrams. Mouse interaction works, and the interface is designed to stay flicker-free, which sounds minor until you spend hours staring at it.
Headless and ACP Modes
Beyond the interactive shell, the CLI runs headless so scripts, bots, and CI/CD pipelines can drive it. It also speaks the Agent Client Protocol, letting an IDE or another agent framework use Grok Build as its agent backend rather than a standalone app.
Extensible Agent Harness
The agent's runtime is open and extensible: you can load skills, plugins, hooks, and MCP servers to shape how it behaves. Hooks let you run your own logic at key points, and skills let you package team conventions so the agent follows them.
Inline Code Diffs
Every change the agent proposes shows up as a diff you can read before applying it. Combined with the plan review step, this keeps you in control instead of trusting a black box to rewrite your files.
Open-Source Core
xAI released the Grok Build core under the Apache 2.0 license, so you can read the agent loop, tool layer, and terminal UI for yourself. You can also compile it locally and point it at your own inference service through a config file.
Pros and cons
Pros
- Runs where developers actually work, right in the terminal and project directory.
- Plan Mode plus inline diffs give you review points before code lands.
- Parallel subagents with Git worktree isolation handle multi-file tasks well.
- Headless and ACP support make it usable in scripts, CI/CD, and other apps.
- Open-source core (Apache 2.0) lets teams inspect and self-host the agent loop.
Cons
- No free plan. During beta it required the pricey SuperGrok Heavy tier, which puts it out of reach for casual users.
- Setup assumes terminal fluency and Git know-how, so it's not friendly to non-developers.
- An early 2026 security report found the agent uploading whole repositories by default, which xAI later fixed. Still, it's a reminder to know what any coding agent sends off your machine.
Frequently asked questions
It's a terminal AI coding tool for professional engineering work: reading a codebase, planning changes, editing files, running tests, and helping with Git commits. It targets complex, multi-step tasks rather than quick autocomplete.
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