Codex CLI vs. Cosine

Feature	Codex CLI	Cosine

Tagline	Lightweight coding agent that runs in your terminal	Your coding agent in your terminal.
Website	https://openai.com/codex	https://cosine.sh/cli
Language	rust	go
Release Date	April 30, 2025
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	Yes
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	Yes	No
IDE Integration	VS Code, Zed (via ACP)	VS Code
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
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.	Lumen Scout, Lumen Outpost; GPT-5.5/5.4, Claude Opus 4.7/4.6, Claude Sonnet 4.6, Gemini 3.1 Pro, Gemini 3 Flash, Kimi K2.6, GLM 5.1, MiniMax M2.7, Qwen 3.6 Plus, DeepSeek v4 Pro
Supported Subscriptions	ChatGPT	—
Pricing Model	Subscription	Usage Based, Freemium, Subscription
Free Tier	No	No
Price Range	$20-200/mo	$19-999/mo
Source Code Availability	Open Source (Apache-2.0)	Proprietary Software
Source Code	https://github.com/openai/codex	N/A
Development State	active	active