fx (by Vercel) vs OpenCode

Feature	fx (by Vercel)	OpenCode

Tagline	Tiny, open, embeddable, native coding agent by Vercel.	The open source AI coding agent built for the terminal
Website	https://fx.sh	https://opencode.ai
Language	zig	typescript
Release Date	August 17, 2026	May 14, 2025
Last Updated	August 19, 2026	June 28, 2026
Provider Type	Independent	Independent
MCP Support	Yes	Yes
Multi-Agent Support	No	Yes
Git Integration	basic	basic
Multi-File Editing	Yes	Yes
Auto Test Running	No	Yes
Sandbox / Permissions	Yes	Yes
Image / Multimodal Input	Yes	Yes
Voice Mode	No	No
IDE Integration	None - Terminal only	VS Code, Cursor
Hooks / Extensions	No	Yes
Web Search	Yes	Yes
Local Model Support	Yes	Yes
Context Window	Model-dependent	Model-dependent; auto-compact
Terminal Bench		#60 · 51.7% (Terminal-Bench 2.0) ²
AA Coding Agent Index	-	54% · GLM-5.3
Supported Models	All Vercel AI Gateway supported models, including OpenAI, Anthropic, Google, DeepSeek, z.AI, Moonshot, etc	OpenCode managed models, 400+ AI models from OpenRouter - OpenAI, Google, Moonshot AI, xAI, Minimax
Supported Subscriptions	-	ChatGPT SuperGrok GitHub Copilot OpenCode Go / Zen Ollama Cloud
Pricing Model	Free, BYOK, Usage Based	Freemium
Free Tier	No	Yes
Price Range	0 - $20 / mo / Custom (Vercel AI Gateway)	Free (BYOK) / $10/mo
Source Code Availability	Open Source (Apache-2.0)	Open Source (MIT)
Source Code	https://github.com/vercel-labs/fx	https://github.com/anomalyco/opencode
Development State	active	active