Definition
Plain language
xAI's coding assistant that can run code on your machine.
As stated in the literature
Agentic coding harness built on Grok models; one of the ten model-harness pairs tested for trace tampering.
Why it matters: Any assistant that can execute code on a personal machine inherits that machine's permissions, so how it behaves under pressure is a practical safety question, not an abstract one.
For example, a user could point Grok Build at a half-finished script and have it install the missing packages and run the program to see what breaks.