Letta Code vs Mastra Code

Feature	Letta Code	Mastra Code

Tagline	The memory-first coding agent	Coding agent that replaces compaction with Observational Memory
Website	https://letta.com	https://code.mastra.ai/
Language	typescript	typescript
Release Date	December 16, 2025	December 24, 2025
Last Updated	August 19, 2026	September 4, 2026
Provider Type	Independent	Independent
MCP Support	Yes	Yes
Multi-Agent Support	Yes	Yes
Git Integration	basic	basic
Multi-File Editing	Yes	Yes
Auto Test Running	Yes	No
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	No	Yes
IDE Integration	None - Terminal only	ACP (Agent Client Protocol)
Hooks / Extensions	Yes	Yes
Web Search	Yes	Yes
Local Model Support	Yes	Yes
Context Window	Model-dependent	Model-dependent; observation-based
Terminal Bench	#44 · 59.1% ±2.4 (Terminal-Bench 2.0) ¹
Supported Models	Multi-provider with Claude, GPT, Gemini and self-hosted (BYOK).	Claude, GPT, Gemini and thousands more via Mastra's unified model router, plus custom OpenAI-compatible providers
Supported Subscriptions	ChatGPT GitHub Copilot Claude Code OpenCode Go / Zen	Claude Code ChatGPT GitHub Copilot SuperGrok
Pricing Model	Freemium	Free, BYOK
Free Tier	Yes	Yes
Price Range	Free (BYOK) / $20-200/mo	Free (BYOK)
Source Code Availability	Open Source (Apache-2.0)	Open Source (Apache-2.0)
Source Code	c	https://github.com/mastra-ai/mastra
Development State	active	active