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Meta Muse · 8 September 2026

Muse builds on X

Meta shipped Muse on 8 September 2026. 8 first-party ships we cataloged, each with the original post.

Alexandr Wang's Superintelligence Labs trained Muse Spark 1.3 for long agent work, then put it in a Linux VM with a Chromium browser and a Sentinel that has to approve anything leaving the box. Mark Zuckerberg posted the Mac app and opened developer connectors the same month. People started handing it real errands, quizzes, and coding clients.

Official note: Introducing Muse. App: muse.ai. Mac: download. Spark API: dev.meta.ai. Launch post: the original.

Muse

Meta's personal AI agent. Own Secure VM, own browser, does the work across apps. Powered by Muse Spark 1.3.

Reads

First-party threads and essays about Muse, not recaps of someone else's post.

How Meta built safety into Muse

@AIatMeta

Official deep dive. Secure VM, Sentinel on the same box, prompt-injection quarantine, public bug bounty. First-party, long, and the reason they claim the agent can hold your context.

Sep 21, 2026

MuseAIAgentsSecurity

Introducing Muse

@MetaNewsroom

Meta's product note. Personal agent, Muse Spark 1.3, Secure VM, Stripe Link for purchases, free for most of what people need.

Sep 21, 2026

MuseAIAgents

Muse, in short

What is Muse?
Muse is Meta's personal AI agent, launched 8 September 2026. You tell it what to get done. It runs on a dedicated Secure VM with its own browser, connects to apps you pick, and takes action. Muse Spark 1.3 is the model underneath.
How is Muse different from ChatGPT?
Chat models answer in the thread. Muse is built to leave the thread and do the work: mail, calendar, travel, shopping with your approval, files on Mac. It keeps a memory and a Sentinel that has to approve anything leaving the VM.
Where do I get access?
US and Canada on iOS, Android, and muse.ai. Muse for Mac downloads from ai.meta.com/muse/download. Muse Spark 1.3 is in Muse Code and the Meta Model API at dev.meta.ai.
What counts as a Muse build here?
A public URL or repo posted on X by the person who made it, or a first-party Meta ship. Referral dumps and invite-code spam stay off the list.