fx (by Vercel) vs Plandex

Feature	fx (by Vercel)	Plandex

Tagline	Tiny, open, embeddable, native coding agent by Vercel.	Open source AI coding agent for large projects and real world tasks
Website	https://fx.sh	https://github.com/plandex-ai/plandex
Language	zig	go
Release Date	August 17, 2026	March 14, 2024
Last Updated	August 19, 2026	August 19, 2026
Provider Type	Independent	Independent
MCP Support	Yes	No
Multi-Agent Support	No	No
Git Integration	basic	deep
Multi-File Editing	Yes	No
Auto Test Running	No	Yes
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	No
Voice Mode	No	No
IDE Integration	None - Terminal only	None - Terminal only
Hooks / Extensions	No	No
Web Search	Yes	No
Local Model Support	Yes	Yes
Context Window	Model-dependent	2M tokens effective
Supported Models	All Vercel AI Gateway supported models, including OpenAI, Anthropic, Google, DeepSeek, z.AI, Moonshot, etc	Any OpenAI-compatible models and 400+ models from OpenRouter.
Pricing Model	Free, BYOK, Usage Based	Free
Free Tier	No	Yes
Price Range	0 - $20 / mo / Custom (Vercel AI Gateway)	Free (self-hosted)
Source Code Availability	Open Source (Apache-2.0)	Open Source (MIT)
Source Code	https://github.com/vercel-labs/fx	https://github.com/plandex-ai/plandex
Development State	active	inactive