Blackbox AI CLI vs. fx (by Vercel)

Feature	Blackbox AI CLI	fx (by Vercel)

Tagline	Feature-rich AI coding agent in your terminal	Tiny, open, embeddable, native coding agent by Vercel.
Website	https://www.blackbox.ai/cli	https://fx.sh
Language	typescript	zig
Release Date	September 20, 2025	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	Yes	No
IDE Integration	35+ IDE integrations including VS Code, JetBrains
Hooks / Extensions	Yes	No
Web Search	Yes	Yes
Local Model Support	Yes	Yes
Context Window	Model Dependent	Model dependent
Supported Models	400+ models including Opus, GPT, Gemini, Qwen, GLM, Grok, Minimax (free), Mimo, Llama, Kimi, Mistral, DeepSeek	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 (BYOK) / $10-40/mo	0 - $20 / mo / Custom (Vercel AI Gateway)
Source Code Availability	Open Source (GPL-3.0)	Open Source (Apache-2.0)
Source Code	https://github.com/blackboxaicode/cli	https://github.com/vercel-labs/fx
Development State	active	active