Grok Build

What it does

Grok Build is a coding agent from xAI that takes natural-language prompts about your project, including references to specific files such as @src/main.rs, and responds with explanations and code work inside your repository. You can use it in a full-screen interactive terminal interface with mouse support, run it headlessly with a single prompt that can return streaming JSON, or connect it to other applications through the Agent Client Protocol (ACP).

In practice, you install it with a shell or PowerShell command, change into a project folder and run grok. The headless mode suits scripts, automations and bots. The agent is extensible through skills, plugins, marketplaces, modes, commands, hooks and MCP servers, and a grok inspect command lists the config, instructions, skills, hooks and MCP servers it found in the current directory. You can also define custom models in a config file. The grok-4.7 model is also offered through the xAI API for your own agent loops.

It suits developers who work in the terminal or want an agent they can script, and the documentation also covers enterprise deployments. You sign in through a browser on first launch, or set an XAI_API_KEY where no browser is available. Windows, macOS, Linux and WSL are supported. For billing details on Grok Build, request a quote or check xAI's current plans. Results with custom or third-party models will depend on those models.

What it can do

• Interactive full-screen terminal interface with mouse support
• Headless prompts for scripts and bots, with streaming JSON output
• Agent Client Protocol (ACP) support for use inside other apps
• Skills, plugins and marketplaces, modes and commands
• Custom model definitions via ~/.grok/config.toml
• Grok inspect to list discovered config, instructions, skills, hooks and MCP servers

Works with

• Agent Client Protocol (ACP)
• MCP servers

Example workflows

Understand an unfamiliar repository

Illustrative example. Input: a project folder. Steps: install the CLI, cd into the project, run grok, then ask 'Explain this repo' and follow up with @file references. Output: written walkthroughs of the codebase and individual files.

Script an analysis in automation

Illustrative example. Input: a prompt and a codebase available to a script or bot. Steps: set XAI_API_KEY, call grok -p with a prompt and --output-format streaming-json. Output: streamed JSON that another program can consume.

Before you choose

• Billing for Grok Build is handled separately from published plan pricing, so request a quote or confirm current terms with xAI before committing.
• Headless and bot use need an API key rather than browser sign-in.
• Results with custom or third-party models depend on those models.

Listed under

• Coding

Get started

Then run grok in a project and sign in via browser

1. Run the install command for your OS (curl script for macOS/Linux/WSL, irm script for PowerShell).
2. cd into your project and run grok; authenticate in the browser on first launch.
3. In non-browser environments, export XAI_API_KEY; optionally add custom models to ~/.grok/config.toml and check with grok inspect.

Grok Build’s product page does not establish a dedicated subscription price. Check access and billing terms in the product; shared X subscriptions alone do not establish Build entitlements.

We couldn’t find published prices for Grok Build. See their pricing page ↗

Sources for this overview

Product pages, documentation, and pricing checked 28 Oct 2026. Each source supports part of the overview; availability and prices can change.

• Grok Build: SpaceXSI's Coding Agent | SpaceXSI Docs ↗docs.x.ai
• Pricing | SpaceXSI Docs ↗docs.x.ai
• Introducing The X Subscription | SpaceXSI ↗x.ai

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knowledge_base

Last checked 28 Oct 2026. Every field keeps its source and date; unknown means we couldn’t confirm it.