Tool profile · updated
fx
fx is ranked #14 of 15 for terminal coding agents on AI Tool Podium.
Our verdict
Vercel Labs' open-source (Apache-2.0) terminal agent shipped as one small native binary for macOS and Linux. Bring a ChatGPT or Grok subscription, Vercel AI Gateway, or any OpenAI-compatible endpoint such as Ollama. Experimental and pre-1.0, so use with care.
fx fact sheet
Checked
- What it does
- A coding agent for the terminal that ships as one native binary of about 6 MiB, written in Zig. Built-in tools find, read and edit files, run shell commands, search the web and start subagents.Source: github.com/vercel-labs/fx · checked
- Pricing
- Free and open source. You pay for the model you connect: a ChatGPT or Grok subscription, Vercel AI Gateway, or your own OpenAI-compatible endpoint such as Ollama or OpenRouter.Source: github.com/vercel-labs/fx · checked
- Open source and license
- Open source under the Apache License 2.0.Source: github.com/vercel-labs/fx · checked
- Key features
- Runs on macOS and Linux, on x86_64 and arm64
- Scriptable with fx ask --json
- Speaks the Agent Client Protocol through fx acp
- libfx on npm embeds it in Node and WebAssembly
- Marked experimental by Vercel Labs: use at your own risk
Facts come from fx's own site, docs or code repository, as publicly stated on the date shown. Prices and plans change, so check the source before you buy. Spot something out of date? Tell us.
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Related comparisons
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Frequently asked
What is fx?
Vercel Labs' open-source (Apache-2.0) terminal agent shipped as one small native binary for macOS and Linux. Bring a ChatGPT or Grok subscription, Vercel AI Gateway, or any OpenAI-compatible endpoint such as Ollama. Experimental and pre-1.0, so use with care.
How much does fx cost?
Free and open source. You pay for the model you connect: a ChatGPT or Grok subscription, Vercel AI Gateway, or your own OpenAI-compatible endpoint such as Ollama or OpenRouter. Source: https://github.com/vercel-labs/fx, checked 2026-10-23.
Is fx open source?
Open source under the Apache License 2.0. Source: https://github.com/vercel-labs/fx, checked 2026-10-23.
Where does fx rank?
fx is ranked #14 of 15 for terminal coding agents on AI Tool Podium. Ranking last updated 2026-11-10.
What are the alternatives to fx?
Other tools in our terminal coding agents ranking: Claude Code, OpenAI Codex, Antigravity CLI, OpenCode, Factory Droid, Amp, goose, Aider, Gemini CLI, Mirror CLI, Garuda, Praex, Croo, Orbi.
Where is the official fx website?
The official site is https://fx.sh
Is this your tool?
Build fx? Keep this page accurate
If anything on this page is out of date, send us a correction. It is free. We check every change against an official source before we publish it. Paid options below are optional and never change where fx ranks.
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