Codex CLI vs Vix

Feature	Codex CLI	Vix

Tagline	Lightweight coding agent that runs in your terminal	Sleek, Fast and Token Efficient AI Coding Agent
Website	https://openai.com/codex	https://getvix.dev
Language	rust	go
Release Date	April 30, 2025	June 1, 2026
Last Updated	June 29, 2026	August 19, 2026
Provider Type	AI Lab	Independent
MCP Support	Yes	Yes
Multi-Agent Support	Yes	Yes
Git Integration	deep	shallow
Multi-File Editing	Yes	No
Auto Test Running	Yes	No
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	Yes	No
IDE Integration	VS Code, Zed (via ACP)	N/A
Hooks / Extensions	Yes	Yes
Web Search	Yes	Yes
Local Model Support	Yes	No
Context Window	Model-dependent	Model-dependent
Terminal Bench	#1 · 58.2% ±2.8 (Terminal-Bench 4.0) ¹
AA Coding Agent Index	62% · GPT-6 Astra (max)	-
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.	Anthropic Models (Opus 4.8 / 4.7 / 4.6), OpenAI (GPT-5.1 / o3 / 4o), MiniMax, Xiaomin MiMo and 300+ Models on OpenRouter.
Supported Subscriptions	ChatGPT	Claude Code ChatGPT
Pricing Model	Subscription	Free
Free Tier	No	No
Price Range	$20-200/mo	$0
Source Code Availability	Open Source (Apache-2.0)	Open Source (AGPL-3.0)
Source Code	https://github.com/openai/codex	https://github.com/kirby88/vix
Development State	active	active