Cosine vs. Plandex

Feature	Cosine	Plandex

Tagline	Your coding agent in your terminal.	Open source AI coding agent for large projects and real world tasks
Website	https://cosine.sh/cli	https://github.com/plandex-ai/plandex
Language	go	go
Release Date		March 14, 2024
Last Updated	September 4, 2026	August 19, 2026
Provider Type	AI Lab	Independent
MCP Support	Yes	No
Multi-Agent Support	Yes	No
Git Integration	deep	deep
Multi-File Editing	Yes	No
Auto Test Running	Yes	Yes
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	No
Voice Mode	No	No
IDE Integration	VS Code	None - Terminal only
Hooks / Extensions	Yes	No
Web Search	Yes	No
Local Model Support	No	Yes
Context Window	Model dependent	2M tokens effective
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	Any OpenAI-compatible models and 400+ models from OpenRouter.
Pricing Model	Usage Based, Freemium, Subscription	Free
Free Tier	No	Yes
Price Range	$19-999/mo	Free (self-hosted)
Source Code Availability	Proprietary Software	Open Source (MIT)
Source Code	N/A	https://github.com/plandex-ai/plandex
Development State	active	inactive