The ecosystem of terminal-based development assistants is experiencing its golden age. Tools like Claude Code, Aider, and OpenCode have demonstrated that the command line is the natural space where Artificial Intelligence deploys its true agentic potential.
Now, xAI (Elon Musk's AI company) enters this domain with the launch and subsequent open-source release of Grok Build (grok-build), its own coding agent harness and interactive TUI (Terminal User Interface).
Grok Build stands as a direct rival to Claude Code: a CLI assistant written in Rust that resides in the console and is capable of editing files, planning complex parallel tasks, and self-correcting code through command execution. However, its release has not been without controversy and debates regarding data privacy.
In this guide, we explain exactly what Grok Build is, how to install it step-by-step, how to configure it locally, and why its recent telemetry controversy over proprietary codebase handling is a vital security lesson for any SME.
The Telemetry Controversy and the Pivot to Open Source
Shortly after its initial release, the developer community discovered a concerning default behavior in Grok Build: the tool was silently uploading entire Git repositories (including commit history, branches, and potentially sensitive SSH keys or environment variables in unignored .env files) to xAI's cloud storage buckets.
For medium-sized and technology enterprises (SMEs), this behavior represents an unacceptable security and compliance (GDPR) risk. The community's response was swift.
In an emergency response to mitigate the backlash and restore trust, xAI took three key measures:
- Disabled default telemetry upload, turning the tool into a "local-first" utility.
- Committed to permanently deleting the proprietary code data previously gathered on their servers.
- Released the entire source code of Grok Build on GitHub under the Apache 2.0 license.
This controversy demonstrates why technological sovereignty is indispensable. Because the codebase is now public, your SME's developers can inspect exactly what data the CLI transmits outside the local network, configuring it to operate in a completely private environment.
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Tutorial: How to Install and Configure Grok Build
Written in Rust, Grok Build stands out for being extremely fast and lightweight. Follow these steps to set it up:
Step 1: Install the CLI
You can install the official compiled binary using the installer scripts provided by xAI:
- On Linux, macOS, or WSL (Windows Subsystem for Linux):
curl -fsSL https://x.ai/cli/install.sh | bash - On Windows (PowerShell):
irm https://x.ai/cli/install.ps1 | iex
After installation completes, open a new terminal window and verify it runs successfully:
grok --version
Step 2: Configure Custom Endpoints and Local LLMs (config.toml)
To ensure your proprietary code is not sent to xAI's cloud unnecessarily, and to experiment with local models or private controlled APIs, you can redirect Grok Build by editing its configuration file.
Grok Build loads configuration from a config.toml file located in the following paths depending on your operating system:
- Linux/macOS:
~/.grok/config.toml - Windows:
%USERPROFILE%\.grok\config.toml
Open or create this file and structure it as follows to point to a custom API or local model server (such as Ollama):
[model.local-model]
model = "deepseek-coder"
base_url = "http://localhost:11434/v1"
name = "Local DeepSeek"
env_key = "LOCAL_API_KEY"
[models]
default = "local-model"
Once saved, run the following in your terminal to validate that the configuration was discovered and parsed successfully:
grok inspect
This command will output the plugins, default models, and tools available to the harness on your machine.
Grok Build vs. Claude Code: What is the Difference?
Unlike Claude Code — which focuses on a chat-based console dialogue powered by the Sonnet model —, Grok Build focuses on a fullscreen, mouse-interactive Terminal User Interface (TUI).
- TUI (Fullscreen Console Interface): Grok Build splits the terminal into interactive panes where you can view your repository map, task plans, and parallel code execution progress in a highly graphical console environment.
- Plugin Ecosystem: It is designed with an adapter pattern that makes it easy to connect external tools via the MCP (Model Context Protocol).
Conclusion
The release of Grok Build solidifies the trend of open-source coding assistants. Although the initial telemetry controversy damaged xAI's public image, their swift reaction in open-sourcing the CLI under Apache 2.0 and disabling default uploads is a great victory for the ecosystem. If you are looking for a terminal assistant with a rich interactive TUI and the native speed of Rust, Grok Build is a highly capable option to consider—provided it is configured securely in a local-first manner.