A terminal, a file system and a browser for Muse

Meta has announced Muse Agent, which runs on Muse Spark 1.3, a model Meta presented as trained for long-horizon agentic workflows and coding tasks. The launch was flagged in a post on Threads, which describes an agent with a computer of its own and access to a full web browser.

At a glance

• The agent is given its own computer with a file system and a terminal, so it can write code and build the tools a task requires, alongside a full web browser.
• Browser access covers search, site navigation and form filling, and the announcement extends it to completing transactions, naming booking and purchasing as examples of what the agent can carry out.
• Distribution is the unsettled part: the post cites iOS and Android with apparent regional limits, while independent coverage reported Meta testing Muse as a personal AI agent in an invite-only iPhone app.

A terminal, a file system and a browser turn an assistant into something that acts rather than answers, and the consequences of a mistake change shape accordingly: an unwanted purchase cannot be regenerated the way a bad paragraph can. The narrow footprint reported around the iPhone test reads as a cautious rollout for a system trusted with transactions, and it likely explains why the availability picture stays inconsistent across descriptions.

Muse gets a computer of its own, with a file system and a terminal

The announcement is specific about the environment rather than the interface. The agent is given a computer of its own, with a file system and a terminal, and a browser it drives directly, and the wording published with the launch sets out both:

Muse has its own computer, with a file system and a terminal, so it can write its own code and build the tools a task needs. It also has access to a full web browser, so it can search, navigate sites, fill out forms, and complete transactions, like booking and purchasing.

The wording places two capabilities side by side: code the agent writes for itself, and web access it operates directly. Search, site navigation and form filling sit on the browser side, and so do transactions, with booking and purchasing named as the examples. Building the tools a task needs is described as something the agent does itself, on that machine.

The Threads post cites iOS and Android while a reported test is invite-only on iPhone

Where Muse can actually be run is the least settled part of the launch. The Threads post lists both iOS and Android, and adds that access appears to be restricted to certain regions. Independent coverage reported that Meta was testing Muse as a personal AI agent in an invite-only iPhone app.

The framing in Meta's own announcement is that Muse is a personal AI agent able to take actions on a user's behalf. The reported invite-only iPhone test and the two-platform availability cited in the Threads post are attached to the same product name.

Meta has spent the past several years adding AI features inside Facebook, Instagram and WhatsApp, and a separate agent application moves that effort onto a surface of its own, running on a model Meta describes in terms of agentic workflows and coding.

Which regions get Muse

Whether the invite-only iPhone test and the two-platform listing describe the same stage of a single rollout is not something the two descriptions available so far settle. Which regions are covered remains unclear, as does the timing of any wider release and whether the Android build arrives alongside the iPhone one.