Letta Code vs Vix

Feature	Letta Code	Vix

Tagline	The memory-first coding agent	Sleek, Fast and Token Efficient AI Coding Agent
Website	https://letta.com	https://getvix.dev
Language	typescript	go
Release Date	December 16, 2025	June 1, 2026
Last Updated	August 19, 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	Yes	No
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	No	No
IDE Integration	None - Terminal only	N/A
Hooks / Extensions	Yes	Yes
Web Search	Yes	Yes
Local Model Support	Yes	No
Context Window	Model-dependent	Model-dependent
Terminal Bench	#44 · 59.1% ±2.4 (Terminal-Bench 2.0) ¹
Supported Models	Multi-provider with Claude, GPT, Gemini and self-hosted (BYOK).	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	ChatGPT GitHub Copilot Claude Code OpenCode Go / Zen	Claude Code ChatGPT
Pricing Model	Freemium	Free
Free Tier	Yes	No
Price Range	Free (BYOK) / $20-200/mo	$0
Source Code Availability	Open Source (Apache-2.0)	Open Source (AGPL-3.0)
Source Code	c	https://github.com/kirby88/vix
Development State	active	active