Mastra Code vs Vix

Feature	Mastra Code	Vix

Tagline	Coding agent that replaces compaction with Observational Memory	Sleek, Fast and Token Efficient AI Coding Agent
Website	https://code.mastra.ai/	https://getvix.dev
Language	typescript	go
Release Date	December 24, 2025	June 1, 2026
Last Updated	September 4, 2026	August 19, 2026
Provider Type	Independent	Independent
MCP Support	Yes	Yes
Multi-Agent Support	Yes	Yes
Git Integration	basic	shallow
Multi-File Editing	Yes	No
Auto Test Running	No	No
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	Yes	No
IDE Integration	ACP (Agent Client Protocol)	N/A
Hooks / Extensions	Yes	Yes
Web Search	Yes	Yes
Local Model Support	Yes	No
Context Window	Model-dependent; observation-based	Model-dependent
Supported Models	Claude, GPT, Gemini and thousands more via Mastra's unified model router, plus custom OpenAI-compatible providers	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 GitHub Copilot SuperGrok	Claude Code ChatGPT
Pricing Model	Free, BYOK	Free
Free Tier	Yes	No
Price Range	Free (BYOK)	$0
Source Code Availability	Open Source (Apache-2.0)	Open Source (AGPL-3.0)
Source Code	https://github.com/mastra-ai/mastra	https://github.com/kirby88/vix
Development State	active	active