Amp vs. Cosine

Feature	Amp	Cosine

Tagline	The frontier coding agent	Your coding agent in your terminal.
Website	https://ampcode.com	https://cosine.sh/cli
Language	typescript	go
Release Date	April 14, 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	No	No
IDE Integration	VS Code	VS Code
Hooks / Extensions	Yes	Yes
Web Search	Yes	Yes
Local Model Support	No	No
Context Window	Model-dependent	Model dependent
Supported Models	Claude Opus 4.8, GPT-5.5, GPT-5.3-Codex, Gemini 3.1 Pro / Flash	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
Pricing Model	Usage Based	Usage Based, Freemium, Subscription
Free Tier	Yes	No
Price Range	Free daily grant, then usage-based	$19-999/mo
Source Code Availability	Proprietary Software	Proprietary Software
Source Code		N/A
Development State	active	active