grok-build

Grok Build is SpaceXAI's terminal coding agent, the Grok answer to Claude Code. It reads your codebase, edits files, runs commands, and works through multi-step tasks in a full-screen TUI. It also runs headless for CI and plugs into editors through the Agent Client Protocol. The client is Apache 2.0.

Install is one curl command, with prebuilt binaries for macOS, Linux, and Windows. First launch signs you into an x.ai account, and the product page says it is free to try, though the free tier's limits are not published. It is not locked to Grok either: the docs cover custom model endpoints, including OpenAI-style and Anthropic-style APIs and self-hosted models. Your MCP servers and skills carry over, because it reads the config files Claude Code and Cursor already use.

Solo: free to try, then SuperGrok at $30/mo or SuperGrok Plus at $100/mo for more usage, or pay per token through the API. Team accounts get OIDC single sign-on and zero data retention. anomalyco/opencode and Aider-AI/aider are the community-run alternatives, and openai/codex is the same open-client, vendor-model play.

The catch: open source here means you can read and build it, not shape it. The public repo is a periodic sync from a private monorepo, and outside contributions are not accepted. There are still no tagged GitHub releases, even though versioned binaries ship several times a month.