Codebuff vs. fx (by Vercel)

Feature	Codebuff	fx (by Vercel)

Tagline	AI coding assistant for your terminal	Tiny, open, embeddable, native coding agent by Vercel.
Website	https://codebuff.com	https://fx.sh
Language	typescript	zig
Release Date	November 4, 2024	August 17, 2026
Last Updated	April 28, 2026	August 19, 2026
Provider Type	Independent	Independent
MCP Support	Yes	Yes
Multi-Agent Support	Yes	No
Git Integration	deep	minimal
Multi-File Editing	Yes	Yes
Auto Test Running	Yes	No
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	No	No
IDE Integration	None - terminal only
Hooks / Extensions	Yes	No
Web Search	Yes	Yes
Local Model Support	Yes	Yes
Context Window	Model-dependent	Model dependent
Supported Models	Any supported OpenRouter model	All Vercel AI Gateway supported models, including OpenAI, Anthropic, Google, DeepSeek, z.AI, Moonshot, etc
Pricing Model	Freemium	Free, BYOK, Usage Based
Free Tier	Yes	No
Price Range	Free 500 credits/mo / $100-500/mo	0 - $20 / mo / Custom (Vercel AI Gateway)
Source Code Availability	Open Source (Apache-2.0)	Open Source (Apache-2.0)
Source Code	https://github.com/CodebuffAI/codebuff	https://github.com/vercel-labs/fx
Development State	active	active