Amp vs. Letta Code

Feature	Amp	Letta Code

Tagline	The frontier coding agent	The memory-first coding agent
Website	https://ampcode.com	https://letta.com
Language	typescript	typescript
Release Date	April 14, 2025	December 16, 2025
Last Updated	June 29, 2026	June 28, 2026
Provider Type	AI Lab	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	No	No
IDE Integration	VS Code	None - terminal only
Hooks / Extensions	Yes	Yes
Web Search	Yes	Yes
Local Model Support	No	Yes
Context Window	Model-dependent	Model-dependent
Terminal Bench 2.0		#48 · 59.1% ±2.4 ²
Supported Models	Claude Opus 4.8, GPT-5.5, GPT-5.3-Codex, Gemini 3.1 Pro / Flash	Multi-provider with Claude, GPT, Gemini and self-hosted (BYOK).
Supported Subscriptions	—	ChatGPT GitHub Copilot Claude Code OpenCode Go / Zen
Pricing Model	Usage Based	Freemium
Free Tier	Yes	Yes
Price Range	Free daily grant, then usage-based	Free (BYOK) / $20-200/mo
Source Code Availability	Proprietary Software	Open Source (Apache-2.0)
Source Code		c
Development State	active	active