xAI drops Grok Build and Grok Computer

xAI is pivoting from a chatbot provider to an agentic platform, directly challenging Cursor and Claude Code with a parallel agent strategy. Grok Build's Arena Mode allows developers to pit multiple model variants against each other to find the best implementation, while the Grok Computer desktop agent leverages Tesla's vision stack for autonomous workflows. A local CLI-backed architecture ensures high-privilege environment access despite the web-first experience. Integration with Grok 4.3 suggests xAI is rapidly closing the reasoning gap with industry leaders for specialized coding tasks.