Gemini CLI vs. Letta Code

Feature	Gemini CLI	Letta Code
Tagline	An open-source AI agent that brings Gemini into your terminal	The memory-first coding agent
Website	https://geminicli.com	https://letta.com
Language	typescript	typescript
Release Date	June 24, 2025	December 16, 2025
Last Updated	June 3, 2026	June 3, 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	1M tokens	Model-dependent
Terminal Bench 2.0	#42 · 61.4% ±4.1 1	#48 · 59.1% ±2.4 2
Supported Models	Gemini 3.5 Flash, Gemini 3.1 Pro	Multi-provider with Claude, GPT, Gemini and self-hosted (BYOK).
Pricing Model	Free	Freemium
Free Tier	Yes	Yes
Price Range	Free (1,000 req/day)	Free (BYOK) / $20-200/mo
Source Code Availability	Open Source (Apache-2.0)	Open Source (Apache-2.0)
Source Code	https://github.com/google-gemini/gemini-cli	https://github.com/letta-ai/letta-code
Development State	active	active

¹ Gemini CLI tested with Gemini 3.1 Pro on Terminal Bench v2.0.

² Letta Code tested with Claude Opus 4.5 on Terminal Bench v2.0.