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 3, 2026	June 4, 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 2.0	#6 · 82.0% ±2.2 1	#1 · 90.0% ±2.1 2
Supported Models	All frontier GPT, Codex models: GPT-5.5, GPT-5.4, 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.
Pricing Model	Subscription	$0
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

¹ Codex CLI tested with GPT-5.5 on Terminal Bench v2.0.

² Vix tested with Claude Opus 4.7 on Terminal Bench v2.0.