Grok Build beta (agentic coding agent that lives in your terminal) is now open to all SuperGrok and X Premium+ users. Before only SuperGrok Heavy users had access.You install it once with a single command, then you can type natural-language instructions like:“Make a rollercoaster simulator” or “Build a todo app in the style of Apple” etc..and Grok will:- Plan Mode -> create a step-by-step plan you review and approve before it touches any code- Use sub-agents that run in parallel for complex task