Meta Muse: what it is, what people build with it, and where it falls short

What Muse is

Muse is Meta's personal AI agent. According to Meta's launch post, you give it a goal, it works out a plan, and it keeps going after you close the app. It can send emails, fill in forms, book travel and make suggestions based on what it remembers about you. It is powered by Muse Spark, Meta's model family, and was announced by Mark Zuckerberg on X on 8 September 2026.

Meta says each user's agent runs in a dedicated cloud environment called the Muse Secure VM. A separate agent named Sentinel approves actions that reach the internet, the agent does not see passwords or payment methods, and users get an audit trail. A fully encrypted Muse Confidential VM is described as coming later.

A second product shares the brand. Muse Code is a terminal coding agent that Meta released in beta on 5 August 2026 alongside Muse Spark 1.2, per Meta's research post. It left beta on 31 August with inter-session messaging, parallel subagent workflows, a rewind feature and a TypeScript SDK in developer preview, according to Meta's developer blog. There is also an open-weight on-device model, Muse Glimmer, which community projects such as Muse-Glimmer use for local agents.

Release, access and pricing

Meta's announcement gives a release date of 8 September 2026. Muse is rolling out in the US on iOS, Android and the web at muse.ai, with AI glasses listed as coming. On price, the only official statement I verified is that it is free for most of what people need, with subscription plans for those who want more. I did not find exact plan prices on an official or press page I could read, so none are quoted here. Muse Code has three monthly subscription options, but the page I fetched did not list the amounts.

What people build and do with it

Editor and desktop wrappers for Muse Code. The largest cluster is tooling that puts Muse Code into familiar environments. helicon is a desktop and web app with diffs and approval prompts. Two adapters, muse-acp and muse-code-acp, bring it to Zed, JetBrains and other editors through the Agent Client Protocol. muse-code-openrouter routes it to OpenRouter models, and muse-code-sbx-kit runs it in a Docker sandbox.

Games and apps. One developer used Muse Code and the Unity CLI to convert a mini-golf game into a VR title (MinimalGolfVR). freeCodeCamp's three-hour video course builds a Go and SQLite community site with Docker Compose, per its write-up.

Research and scraping. A developer described using Muse's browser to comb Reddit and YouTube for concert footage for his own site, and found the plan generous with usage (sigh.dev).

Errands. Journalists tried everyday tasks. CNN's reporter used the agent for things like planning a date night and a packing schedule, while Slate reported a flight booking that stalled on a captcha.

Skills, agents and hardware. Community catalogs such as awesome-muse-skills collect agent skills, and nanoMuse is an open-source agent with a similar always-working design. TechCrunch reports that Meta released open-source firmware and a Linux SDK so makers can connect Muse to boards, displays and sensors.

Limits and caveats

• Availability is US-only at launch, and glasses support is still to come.
• Reviews are mixed. Slate's booking test failed, and security-minded coverage has raised concerns, for example the Hacker News threads on a reported 0-day and on home addresses given to strangers. I only saw those through headlines, so check the originals.
• Some analysis is inference. One blogger argues from session logs that a subagent used an OpenAI-style model, and another stress-tested the multi-agent runtime. Neither is confirmed by Meta.
• Many community projects are unofficial and small. Star counts are in the tens, and several automate a logged-in session, so read the code before trusting one with your accounts.
• Muse needs access to email, calendar and browser data to be useful, which is a real privacy trade-off.

Frequently asked questions

When did Meta Muse launch?

Meta announced it on 8 September 2026, starting in the US on iOS, Android and the web.

Is Muse free?

Meta says it is free for most of what people need, with subscription plans for more. Exact prices were not verified here.

What is the difference between Muse and Muse Code?

Muse is the personal agent for errands and goals. Muse Code is a separate terminal coding agent, released in beta on 5 August 2026.

Can developers build on Muse?

Yes. Muse Code has a TypeScript SDK in developer preview, and Meta has released firmware and a Linux SDK for custom hardware.

Is it safe to give Muse access to my accounts?

Meta describes isolation, an approval agent and audit trails, but press reports describe privacy and reliability problems. Grant access cautiously.