Antigravity CLI vs Letta Code

Feature	Antigravity CLI	Letta Code

Tagline	Google's coding agent for the terminal, and the replacement for Gemini CLI	The memory-first coding agent
Website	https://antigravity.google/product/antigravity-cli	https://letta.com
Language	go	typescript
Release Date	May 19, 2026	December 16, 2025
Last Updated	September 27, 2026	August 19, 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	Antigravity IDE	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) ²
AA Coding Agent Index	42% · Gemini 3.8 Flash (high)	-
Supported Models	Gemini 3.5 Pro/Flash, Gemini 3.1 Pro, Gemini 3 Flash, Claude Sonnet / Opus 4.7, GPT-OSS-120b	Multi-provider with Claude, GPT, Gemini and self-hosted (BYOK).
Supported Subscriptions	-	ChatGPT GitHub Copilot Claude Code OpenCode Go / Zen
Pricing Model	Freemium, Subscription, Usage Based, BYOK	Freemium
Free Tier	Yes	Yes
Price Range	$0 - $200	Free (BYOK) / $20-200/mo
Source Code Availability	Proprietary Software	Open Source (Apache-2.0)
Source Code	N/A	c
Development State	active	active