--- title: "Helicon vs the Codex desktop app" url: https://helicon.sh/compare/codex-app description: "How a Muse Code desktop client compares with OpenAI's Codex app: same category, different agent, different billing, different openness." updated: 2026-09-19 site: Helicon --- # Helicon vs the Codex and ChatGPT desktop app The Codex desktop experience wraps OpenAI's coding agent and your OpenAI plan. Helicon wraps Meta's Muse Code CLI and your Muse Code subscription. Both give a terminal agent a window with projects, sessions, diffs and approvals. The choice is decided by which agent you already pay for, not by the interface. ## At a glance | | Helicon | Codex app | | --- | --- | --- | | Agent underneath | Muse Code CLI, from Meta | Codex, from OpenAI | | Who ships it | Community, unofficial | OpenAI, official | | License | MIT | Proprietary | | Billing | Existing Muse Code subscription | OpenAI plan or API | | Local state | SQLite on your machine | Vendor managed | | Remote daemon | Yes, same UI in a browser | Cloud execution model | | Approvals | Surfaced one to one, never bypassed | Vendor defined | _Helicon compared with the Codex and ChatGPT desktop app._ ## What each one is Codex popularised the idea that you can hand a task to an agent and come back to a reviewable result rather than watching a terminal. Its desktop and cloud surfaces are built around that. Helicon is local first by design. The daemon runs on your machine, one `muse serve` host per workspace, all state in SQLite next to you, and nothing about your code, prompts, threads or files leaves the machine. The only outbound request Helicon makes for itself is an update check. ## Where they actually differ ### Local first versus cloud first Helicon does not execute work in someone else's environment. The agent runs where you run it, against the checkout on your disk. ### Auditability MIT licensed, one public repository for the desktop app, web app, daemon and site. You can read the protocol calls it makes. ### Subscription reuse Helicon adds no billing. It uses your existing Muse Code plan through your own `muse login`, which is exactly the complaint people have about tools that route a paid plan into their own API metering. ### Windows Signed installer, auto update, native Muse Code on Windows with WSL2 and path translation as the fallback. ## Choose the Codex and ChatGPT desktop app if - Your agent is Codex and your plan is with OpenAI. - You want cloud execution and vendor managed environments. ## Choose Helicon if - Your agent is Muse Code and you want a window for it. - You want everything to stay on your machine. - You want an open source client you can read and fork. - You want one UI that works as a desktop app and in a browser. ## Can you use both? They do not conflict. Different agents, different bills, different repositories if you like. Helicon only claims to be the home for Muse Code sessions. ## Frequently asked questions ### Does Helicon send my code anywhere? No. Nothing about your code, prompts, threads or files leaves your machine. The desktop app asks helicon.sh whether a newer version exists, which reports the platform, the version and a weekly hash of the IP. There is no account. ### Can Helicon run tasks in the cloud? It can point at a daemon on another machine you control, which is how the web app works. It does not execute work in a hosted environment run by us. ### Is Helicon a fork of anything? No. It is an independent MIT project built on Meta's Muse Code Session Protocol SDK. ## Related - [The muse terminal](https://helicon.sh/compare/muse-code-terminal): How a Muse Code GUI differs from the muse CLI terminal interface: session history, inline diffs, approvals and cost, side by side with what the TUI already does well. - [VS Code extensions](https://helicon.sh/compare/vs-code-extension): A standalone Muse Code desktop app compared with running the muse CLI inside VS Code: where an editor panel wins, where a separate session home wins, and how to run both. - [Zed with ACP](https://helicon.sh/compare/zed-acp): Running Muse Code inside Zed through an Agent Client Protocol bridge, compared with a standalone Muse Code desktop app. Editor native versus session native. - [JetBrains IDEs](https://helicon.sh/compare/jetbrains-acp): Muse Code inside IntelliJ, PyCharm, GoLand or WebStorm through an Agent Client Protocol plugin, compared with a standalone Muse Code desktop app. - [Claude Code desktop](https://helicon.sh/compare/claude-code-desktop): Two desktop apps for two different coding agents. What Helicon borrows from the Claude Code desktop experience, and what changes because the agent underneath is Muse Code. - [Cursor](https://helicon.sh/compare/cursor): Cursor is an AI editor with its own models and billing. Helicon is a window over the Muse Code CLI on your existing subscription. What each one is actually for. --- Helicon is a free, MIT licensed, unofficial community client for Meta's Muse Code CLI. Not made, sponsored or endorsed by Meta. Source: https://helicon.sh/. Machine readable index: https://helicon.sh/llms.txt