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	June 11, 2026
Provider Type	Independent	Independent
MCP Support	Yes	No
Multi-Agent Support	No	No
Git Integration	minimal	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
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