fx (by Vercel) vs. Zero

Feature	fx (by Vercel)	Zero

Tagline	Tiny, open, embeddable, native coding agent by Vercel.	Open-source Go coding agent for the terminal, 25+ providers
Website	https://fx.sh	https://zero.gitlawb.com/
Language	zig	go
Release Date	August 17, 2026	May 28, 2026
Last Updated	August 19, 2026	September 4, 2026
Provider Type	Independent	Independent
MCP Support	Yes	Yes
Multi-Agent Support	No	Yes
Git Integration	basic	deep
Multi-File Editing	Yes	Yes
Auto Test Running	No	Yes
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	No	Yes
IDE Integration	None - Terminal only	Zed, JetBrains, Neovim (via ACP)
Hooks / Extensions	No	Yes
Web Search	Yes	No
Local Model Support	Yes	Yes
Context Window	Model-dependent	Model-dependent; auto-compaction
Supported Models	All Vercel AI Gateway supported models, including OpenAI, Anthropic, Google, DeepSeek, z.AI, Moonshot, etc	25+ providers: GitLawb OpenGateway (default), AI/ML API, OpenAI, Anthropic, Gemini, xAI, ChatGPT/Codex, OpenRouter, Groq, DeepSeek, Together, Fireworks, Qwen, Moonshot, MiniMax, Bedrock, Vertex, Z.ai, KiloCode, OpenCode Zen/Go; local via Ollama and LM Studio
Supported Subscriptions	—	ChatGPT SuperGrokX Premium+
Pricing Model	Free, BYOK, Usage Based	Free, BYOK
Free Tier	No	Yes
Price Range	0 - $20 / mo / Custom (Vercel AI Gateway)	Free (BYOK)
Source Code Availability	Open Source (Apache-2.0)	Open Source (MIT)
Source Code	https://github.com/vercel-labs/fx	https://github.com/Gitlawb/zero
Development State	active	active