Cosine vs. OpenBlock

Feature	Cosine	OpenBlock

Tagline	Your coding agent in your terminal.	A self-improving coding agent that handles the full dev lifecycle
Website	https://cosine.sh/cli	https://openblocklabs.com/
Language	go	typescript
Release Date		March 16, 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	deep
Multi-File Editing	Yes	Yes
Auto Test Running	Yes	Yes
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	No	No
IDE Integration	VS Code	None - Terminal only
Hooks / Extensions	Yes	Yes
Web Search	Yes	Yes
Local Model Support	No	Yes
Context Window	Model dependent	Model-dependent
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	400+ via OpenRouter (Claude, GPT, Gemini, Grok, open-source)
Pricing Model	Usage Based, Freemium, Subscription	Freemium
Free Tier	No	Yes
Price Range	$19-999/mo	$10-100 (credit-based)
Source Code Availability	Proprietary Software	Proprietary Software
Source Code	N/A	N/A
Development State	active	active