The terminal-based coding agent went from early beta to general release in about 10 weeks, logging roughly 100 updates along the way. From beta to 1.0 in record timeGrok Build first appeared in early beta on May 25, 2026, as a command-line AI agent designed to let developers interact directly with their codebases. Early beta iterations relied on earlier xAI models, but by 1.0, Grok Build transitioned to the Grok 4.5 model. Open source, marketplace distribution, and the data breach questionOn July 15, 2026, about halfway through the beta period, xAI open-sourced Grok Build under the Apache 2.0 license. The AI coding agent arms raceGrok Build isn’t entering a quiet market.