On July 15, 2026, xAI made two moves: Grok Build went fully open-source, and usage limits were reset for all users, both in response to user frustration over privacy concerns and rate caps. Grok Build is xAI's coding agent, a Terminal User Interface (TUI) that previously ran on the Grok 4.5 model, launched publicly on July 8, 2026. Privacy concerns forced the open-source move after security researchers discovered earlier versions syncing entire code repositories—including private data—to Google Cloud servers without clear user consent; xAI stated all previously uploaded user data has since been permanently deleted, and cloud-side data retention disabled. The open-source release on GitHub under xai-org/grok-build includes the core agent loop, all code interaction tools, the terminal UI, and the complete extension system. Running locally means code never leaves the machine, removing cloud-imposed usage caps for local execution. The usage limit reset on July 15 corrected caching inefficiencies where users hit limits faster than expected; xAI moved paid users to a single shared weekly usage pool in June 2026. This is not the first reset—a similar reset occurred on May 26, 2026, also attributed to caching improvements.