Zero vs. Letta Code

Feature	Zero	Letta Code

Tagline	Open-source Go coding agent for the terminal, 25+ providers	The memory-first coding agent
Website	https://zero.gitlawb.com/	https://letta.com
Language	go	typescript
Release Date	May 28, 2026	December 16, 2025
Last Updated	September 4, 2026	August 19, 2026
Provider Type	Independent	Independent
MCP Support	Yes	Yes
Multi-Agent Support	Yes	Yes
Git Integration	deep	basic
Multi-File Editing	Yes	Yes
Auto Test Running	Yes	Yes
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	Yes	No
IDE Integration	Zed, JetBrains, Neovim (via ACP)	None - Terminal only
Hooks / Extensions	Yes	Yes
Web Search	No	Yes
Local Model Support	Yes	Yes
Context Window	Model-dependent; auto-compaction	Model-dependent
Terminal Bench 2.0		#48 · 59.1% ±2.4 ²
Supported Models	25+ providers: GitLawb OpenGateway (default), AI/ML API, OpenAI, Anthropic, Gemini, xAI, ChatGPT/Codex, OpenRouter, Groq, DeepSeek, Together, Fireworks, Qwen, Moonshot, MiniMax, Bedrock, Vertex, Z.ai, KiloCode, OpenCode Zen/Go; local via Ollama and LM Studio	Multi-provider with Claude, GPT, Gemini and self-hosted (BYOK).
Supported Subscriptions	ChatGPT SuperGrokX Premium+	ChatGPT GitHub Copilot Claude Code OpenCode Go / Zen
Pricing Model	Free, BYOK	Freemium
Free Tier	Yes	Yes
Price Range	Free (BYOK)	Free (BYOK) / $20-200/mo
Source Code Availability	Open Source (MIT)	Open Source (Apache-2.0)
Source Code	https://github.com/Gitlawb/zero	c
Development State	active	active