Devin for Terminal vs fx (by Vercel)

Feature	Devin for Terminal	fx (by Vercel)

Tagline	A local coding agent that runs directly in your terminal from Cognition AI	Tiny, open, embeddable, native coding agent by Vercel.
Website	https://devin.ai/terminal	https://fx.sh
Language	rust	zig
Release Date	April 9, 2026	August 17, 2026
Last Updated	September 27, 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	No	No
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	No	No
IDE Integration	Windsurf IDE	None - Terminal only
Hooks / Extensions	Yes	No
Web Search	Yes	Yes
Local Model Support	No	Yes
Context Window	Model-dependent	Model-dependent
Terminal Bench	#8 · 18.6% ±3.0 (Terminal-Bench 3.0) ¹
AA Coding Agent Index	62% · Fable 5.1 XHigh + SWE-2 Medium	-
Supported Models	Cognition (SWE-2), Anthropic (Fable, Opus, Sonnet, Haiku), OpenAI (GPT, GPT-mini, GPT-Codex), Google (Gemini), Kimi (Kimi K3), GLM (GLM 5)	All Vercel AI Gateway supported models, including OpenAI, Anthropic, Google, DeepSeek, z.AI, Moonshot, etc
Pricing Model	Subscription, Usage Based	Free, BYOK, Usage Based
Free Tier	Yes	No
Price Range	$0, $20 - $200 per month	0 - $20 / mo / Custom (Vercel AI Gateway)
Source Code Availability	Proprietary Software	Open Source (Apache-2.0)
Source Code	N/A	https://github.com/vercel-labs/fx
Development State	active	active