Codex CLI vs. Muse Code

Feature	Codex CLI	Muse Code

Tagline	Lightweight coding agent that runs in your terminal	Meta's coding agent for the terminal and CI, built on Muse Spark
Website	https://openai.com/codex	https://developer.meta.com/ai/products/muse-code/
Language	rust	rust
Release Date	April 30, 2025	August 5, 2026
Last Updated	June 29, 2026	September 4, 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	No
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	Yes	Yes
IDE Integration	VS Code, Zed (via ACP)	None - terminal only
Hooks / Extensions	Yes	Yes
Web Search	Yes	No
Local Model Support	Yes	No
Context Window	Model-dependent	1M tokens
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.	Muse Spark 1.2, Muse Spark 1.1
Supported Subscriptions	ChatGPT	—
Pricing Model	Subscription	Usage Based
Free Tier	No	No
Price Range	$20-200/mo	Usage-based (from $0.10/M tokens)
Source Code Availability	Open Source (Apache-2.0)	Proprietary Software
Source Code	https://github.com/openai/codex	N/A
Development State	active	active