Grok Build CLI vs zerostack

Feature	Grok Build CLI	zerostack

Tagline	SpaceXAI's coding agent harness and TUI	Minimal Rust coding agent optimized for memory footprint
Website	https://x.ai/cli	https://gi-dellav.github.io/zerostack/
Language	rust	rust
Release Date	May 14, 2026	May 12, 2026
Last Updated	October 18, 2026	September 4, 2026
Provider Type	AI Lab	Independent
MCP Support	Yes	Yes
Multi-Agent Support	Yes	Yes
Git Integration	deep	deep
Multi-File Editing	Yes	Yes
Auto Test Running	Yes	Yes
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	No	No
IDE Integration	None - Terminal only	Zed (via ACP), Neovim (via CodeCompanion.nvim + ACP)
Hooks / Extensions	Yes	Yes
Web Search	Yes	Yes
Local Model Support	Yes	Yes
Context Window	Model-dependent	Model-dependent; auto-compaction
Terminal Bench	#9 · 20.3% ±3.1 (Terminal-Bench 4.0) ¹
AA Coding Agent Index	47% · Grok 4.6 (xhigh)	-
Supported Models	SuperGrok Heavy, Grok 4.5, 4.20, Grok 4, Grok Build 0.1, custom models including OpenAI compatible models	OpenRouter (default), OpenAI, Anthropic, Gemini, Ollama, plus unlimited custom OpenAI-compatible endpoints (vLLM, LiteLLM, enterprise gateways)
Supported Subscriptions	SuperGrok X Premium	-
Pricing Model	Subscription	Free, BYOK
Free Tier	Yes	Yes
Price Range	$0 (3 Day Trial) / $30 monthly (SuperGrok) / $300 monthly (SuperGrok Heavy)	Free (BYOK)
Source Code Availability	Open Source (EULA)	Open Source (GPL-3.0)
Source Code	https://github.com/xai-org/grok-build	https://github.com/gi-dellav/zerostack
Development State	active	active