Comparison

Muse Code vs Antigravity

Helicon does not run its own agent. It is a free, MIT licensed client for Meta's Muse Code CLI, so the real choice is Muse Code, in Helicon or a terminal, against Google's Antigravity IDE. Choose Antigravity if you want an editor with an agent built in. Choose Muse Code if you already pay for it and want its sessions in a window.

Last updated 20 October 2026 · Markdown version

At a glance

	Helicon	Antigravity	Checked
Who ships it	Community, unofficial, not affiliated with Meta	Google	20 October 2026
License	MIT	Not stated on the pages checked
Price	Free. Needs your own Muse Code plan, or pay-as-you-go billing on Meta's Model API	Available at no charge for developers	20 October 2026
Platforms	Windows, macOS, Linux, the web and a VS Code extension	macOS, Windows, Linux and Googlebook	20 October 2026
Editor	Session window with inline diffs and a file viewer	Full IDE with a code editor and tab autocompletion	20 October 2026
Review of agent work	Inline diffs and approvals	Artifacts, so you manage higher level tasks rather than single tool calls	20 October 2026
Terminal	Runs on the muse CLI from Meta	Separate Antigravity CLI, installed by script	20 October 2026

Helicon compared with the Google Antigravity IDE. The Checked column links the docs or changelog page behind each sourced row.

What each one is

This page compares the Antigravity IDE. Google describes Antigravity as its agentic development platform, and the IDE is a fully featured AI-powered editor with tab autocompletion, commands and agents. Google also ships an Antigravity App, a separate Antigravity CLI and an SDK. This page does not compare those.

Muse Code is Meta's coding CLI. Helicon is a free, MIT licensed desktop and web client for it. It is community built and not affiliated with Meta. Helicon uses your own muse login and your own Muse Code subscription, and it is not a separate agent.

Where they actually differ

Editor or session window

Antigravity is an IDE with a code editor. Helicon is a window for Muse Code sessions. It shows the files an agent touched in a viewer beside the conversation.

Where the agent works

In Antigravity, the agent works across the editor, terminal and browser. Helicon drives the Muse Code CLI in your project.

Cost

Helicon costs nothing. Your Muse Code subscription is the only bill. Google says Antigravity is available at no charge for developers.

Openness

Helicon is MIT licensed and its source is public. The Antigravity pages checked do not state a license.

Choose the Google Antigravity IDE if

You want an editor and an agent in one Google app.
You want tab autocompletion while you type.
You do not have a Muse Code subscription.
You want the agent to work in a browser as well as the editor and terminal.

Choose Helicon if

You already pay for Muse Code and want its sessions in a window.
You want approvals and inline diffs shown in each thread.
You want a free, MIT licensed client with no account.
You want one UI that also runs in a browser against a remote daemon.

Can you use both?

You can open both on the same project folder. Use the Antigravity editor for hand edits and Helicon for Muse Code threads, with their history and approvals.

Helicon is one Muse Code GUI of several, and that page lists the rest. Helicon is free and MIT licensed, and you can try Helicon in your browser on sample data before you install anything.