Gemini CLI vs Mastra Code

Feature	Gemini CLI	Mastra Code

Tagline	An open-source AI agent that brings Gemini into your terminal	Coding agent that replaces compaction with Observational Memory
Website	https://geminicli.com	https://code.mastra.ai/
Language	typescript	typescript
Release Date	June 24, 2025	December 24, 2025
Last Updated	June 29, 2026	September 4, 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	No
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	Yes	Yes
IDE Integration	Antigravity, VS Code, JetBrains IDEs (ACP), Zed (ACP)	ACP (Agent Client Protocol)
Hooks / Extensions	Yes	Yes
Web Search	Yes	Yes
Local Model Support	Yes	Yes
Context Window	1M tokens	Model-dependent; observation-based
Terminal Bench	#15 · 65.8% ±2.7 (Terminal-Bench 2.1) ¹
Supported Models	Gemini 3.5 Flash, Gemini 3.1 Pro	Claude, GPT, Gemini and thousands more via Mastra's unified model router, plus custom OpenAI-compatible providers
Supported Subscriptions	-	Claude Code ChatGPT GitHub Copilot SuperGrok
Pricing Model	Free	Free, BYOK
Free Tier	Yes	Yes
Price Range	Free (1,000 req/day)	Free (BYOK)
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/mastra-ai/mastra
Development State	active	active