Claude Code vs fx (by Vercel)

Feature	Claude Code	fx (by Vercel)

Tagline	An agentic coding tool that lives in your terminal	Tiny, open, embeddable, native coding agent by Vercel.
Website	https://claude.ai/code	https://fx.sh
Language	typescript	zig
Release Date	February 22, 2025	August 17, 2026
Last Updated	September 4, 2026	August 19, 2026
Provider Type	AI Lab	Independent
MCP Support	Yes	Yes
Multi-Agent Support	Yes	No
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	No
IDE Integration	VS Code, JetBrains	None - Terminal only
Hooks / Extensions	Yes	No
Web Search	Yes	Yes
Local Model Support	Yes	Yes
Context Window	1M tokens	Model-dependent
Terminal Bench	#2 · 57.9% ±3.8 (Terminal-Bench 4.0) ¹
AA Coding Agent Index	62% · Fable 5.1 (max, with fallback)	-
Supported Models	Claude Fable 5 / Mythos 5 (Restricted Availability), Opus 4.8, Claude Sonnet 4.6, Claude Haiku 4.5	All Vercel AI Gateway supported models, including OpenAI, Anthropic, Google, DeepSeek, z.AI, Moonshot, etc
Supported Subscriptions	Claude Code	-
Pricing Model	Subscription	Free, BYOK, Usage Based
Free Tier	No	No
Price Range	$17-200/mo	0 - $20 / mo / Custom (Vercel AI Gateway)
Source Code Availability	Proprietary Software	Open Source (Apache-2.0)
Source Code	https://github.com/anthropics/claude-code	https://github.com/vercel-labs/fx
Development State	active	active