fx (by Vercel) vs. GitHub Copilot CLI

Feature	fx (by Vercel)	GitHub Copilot CLI

Tagline	Tiny, open, embeddable, native coding agent by Vercel.	The power of GitHub Copilot in your terminal
Website	https://fx.sh	https://github.com/features/copilot/cli
Language	zig	typescript
Release Date	August 17, 2026	September 24, 2025
Last Updated	August 19, 2026	June 29, 2026
Provider Type	Independent	AI Lab
MCP Support	Yes	Yes
Multi-Agent Support	No	Yes
Git Integration	minimal	deep
Multi-File Editing	Yes	Yes
Auto Test Running	No	Yes
Sandbox / Permissions	Yes	No
Image / Multimodal Input	Yes	Yes
Voice Mode	No	Yes
IDE Integration		VS Code, Cursor, Windsurf, JetBrains, Neovim, Visual Studio, Xcode
Hooks / Extensions	No	Yes
Web Search	Yes	Yes
Local Model Support	Yes	Yes
Context Window	Model dependent	Auto-managed
Supported Models	All Vercel AI Gateway supported models, including OpenAI, Anthropic, Google, DeepSeek, z.AI, Moonshot, etc	Multi-provider (GitHub-managed) and local models
Supported Subscriptions	—	GitHub Copilot
Pricing Model	Free, BYOK, Usage Based	Freemium, Usage Based
Free Tier	No	Yes
Price Range	0 - $20 / mo / Custom (Vercel AI Gateway)	Free / $10-39/mo
Source Code Availability	Open Source (Apache-2.0)	Proprietary Software
Source Code	https://github.com/vercel-labs/fx	https://github.com/github/copilot-cli
Development State	active	active