Letta Code vs OpenBlock

Feature	Letta Code	OpenBlock

Tagline	The memory-first coding agent	A self-improving coding agent that handles the full dev lifecycle
Website	https://letta.com	https://openblocklabs.com/
Language	typescript	typescript
Release Date	December 16, 2025	March 16, 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	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	None - Terminal only	None - Terminal only
Hooks / Extensions	Yes	Yes
Web Search	Yes	Yes
Local Model Support	Yes	Yes
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).	400+ via OpenRouter (Claude, GPT, Gemini, Grok, open-source)
Supported Subscriptions	ChatGPT GitHub Copilot Claude Code OpenCode Go / Zen	—
Pricing Model	Freemium	Freemium
Free Tier	Yes	Yes
Price Range	Free (BYOK) / $20-200/mo	$10-100 (credit-based)
Source Code Availability	Open Source (Apache-2.0)	Proprietary Software
Source Code	c	N/A
Development State	active	active