Codex CLI vs. Grok Build CLI

Feature	Codex CLI	Grok Build CLI

Tagline	Lightweight coding agent that runs in your terminal	Bring Grok into your terminal
Website	https://openai.com/codex	https://x.ai/cli
Language	rust	rust
Release Date	April 30, 2025	May 14, 2026
Last Updated	June 29, 2026	July 15, 2026
Provider Type	AI Lab	AI Lab
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	Yes	No
IDE Integration	VS Code, Zed (via ACP)	None - Terminal only
Hooks / Extensions	Yes	Yes
Web Search	Yes	Yes
Local Model Support	Yes	Yes
Context Window	Model-dependent	Model dependent
Terminal Bench 2.0	#6 · 82.0% ±2.2 ¹
Supported Models	All frontier GPT, Codex models: GPT-5.6 Sol / Terra / Luna, GPT-5.5, GPT-5.4 pro, GPT-5.3-Codex, optional custom models.	SuperGrok Heavy, Grok 4.5, 4.20, Grok 4, Grok Build 0.1, custom models including OpenAI compatible models
Supported Subscriptions	ChatGPT	SuperGrok X Premium
Pricing Model	Subscription	Subscription
Free Tier	No	Yes
Price Range	$20-200/mo	$0 (3 Day Trial) / $30 monthly (SuperGrok) / $300 monthly (SuperGrok Heavy)
Source Code Availability	Open Source (Apache-2.0)	Open Source (EULA)
Source Code	https://github.com/openai/codex	https://github.com/xai-org/grok-build
Development State	active	active