Grok Build

https://x.ai/news/grok-build-cli

$0.20/$1.50 per M tokens via API; CLI bundled with SuperGrok ($30/mo) or X Premium+ ($40/mo)

Up to 8 Parallel Sub-Agents — Multiple agents work simultaneously on separate branches for faster wall-clock time on large tasks
Plan-and-Approve Flow — Agent presents full execution plan before any file is modified
Native MCP Support — Bring Your Own MCP; auto-imports Claude Code config, skills, and MCP servers
Local-First Architecture — No source code transmitted to xAI servers
256K Context Window — Enough for substantial codebases across a working session
Arena Mode (Coming) — Multiple agent outputs ranked with quality scores before developer review
API Access — grok-build-0.1 open since June 1, 2026 at $0.20/$1.50 per M tokens
SWE-Bench Verified — 70.8% on industry-standard coding agent benchmark

Parallel sub-agent architecture genuinely speeds up independent multi-file tasks
Local-first design: code never leaves the developer's machine
Native MCP support with automatic Claude Code config import — low switching cost
Aggressively competitive API pricing ($0.20/$1.50 per M tokens)
Plan-and-approve flow prevents runaway agent damage
Reuses existing MCP ecosystem rather than forcing a new one
Arena Mode (when it ships) could be a genuinely novel workflow feature

SWE-Bench 70.8% trails Claude Code (87.6%) and Codex CLI (88.7%) by ~17 points
Arena Mode — the most innovative feature — isn't live yet
256K context window trails Claude Opus and GPT-5.4 (1M+ tokens)
Early beta with reported usage limit instability
SuperGrok/X Premium+ subscription required for CLI access
Terminal-only workflow — no IDE integration yet
Shorter production track record than Claude Code or Codex CLI