Junie CLI vs Mastra Code

Feature	Junie CLI	Mastra Code

Tagline	An LLM-agnostic coding agent built for real-world development	Coding agent that replaces compaction with Observational Memory
Website	https://junie.jetbrains.com	https://code.mastra.ai/
Language	shell	typescript
Release Date	July 15, 2025	December 24, 2025
Last Updated	June 3, 2026	September 4, 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	No
Sandbox / Permissions	No	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	No	Yes
IDE Integration	JetBrains IDEs	ACP (Agent Client Protocol)
Hooks / Extensions	No	Yes
Web Search	Yes	Yes
Local Model Support	Yes	Yes
Context Window	Model-dependent	Model-dependent; observation-based
Terminal Bench	#21 · 71.0% ±2.9 (Terminal-Bench 2.0) ¹
Supported Models	Multi-provider including BYOK	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	Freemium	Free, BYOK
Free Tier	Yes	Yes
Price Range	Free (BYOK) / $10-60/mo	Free (BYOK)
Source Code Availability	Proprietary Software	Open Source (Apache-2.0)
Source Code	https://github.com/JetBrains/junie	https://github.com/mastra-ai/mastra
Development State	active	active