Cosine vs. Vix

Feature	Cosine	Vix

Tagline	Your coding agent in your terminal.	Sleek, Fast and Token Efficient AI Coding Agent
Website	https://cosine.sh/cli	https://getvix.dev
Language	go	go
Release Date		June 1, 2026
Last Updated	September 4, 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	No	No
IDE Integration	VS Code	N/A
Hooks / Extensions	Yes	Yes
Web Search	Yes	Yes
Local Model Support	No	No
Context Window	Model dependent	Model-dependent
Terminal Bench 2.0		#1 · 90.0% ±2.1 ²
Supported 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	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	—	Claude Code ChatGPT
Pricing Model	Usage Based, Freemium, Subscription	Free
Free Tier	No	No
Price Range	$19-999/mo	$0
Source Code Availability	Proprietary Software	Open Source (AGPL-3.0)
Source Code	N/A	https://github.com/kirby88/vix
Development State	active	active