xAI just did something unusual for a company in the AI arms race: it gave away the code. Grok Build, the company’s terminal-native coding agent, is now fully open-source, with its codebase available on GitHub under xai-org/grok-build. Server-side usage limits have been reset for all users, and the tool can now run locally without cloud-imposed caps.
But the headline move, open-sourcing, is really a cleanup operation dressed as generosity. The release comes after Grok Build was caught syncing entire code repositories to the cloud, even when users had privacy settings enabled.
What happened and why it matters
Grok Build launched in beta around May 2026 as a CLI-powered coding assistant built on xAI’s Grok model. It’s written in Rust and now runs on Grok 4.5, the model xAI released on July 8, 2026.
During scrutiny of the CLI’s behavior, users discovered that Grok Build had been syncing complete repositories to the cloud. Not snippets. Not metadata. Entire repos. This happened regardless of whether users had toggled privacy settings on.
