Usman Salis
The key part is its runtime: an isolated virtual machine, browser automation and an independent security layer.
Secure Virtual Machine
Muse runs inside a Secure Virtual Machine (SVM) — an isolated cloud environment where the agent can operate tools and interact with websites.
User → Muse → Secure VM → Sentinel → External Services
Browser control reduces dependency on dedicated APIs. Muse can navigate websites, enter data and execute multi-step workflows directly through their interfaces.
For example, a travel task can include searching options, comparing prices, selecting dates, filling in passenger details and preparing a booking for approval.
Sentinel: A Separate Security Agent
Meta uses a separate AI system called Sentinel to monitor Muse's actions. Sentinel can block an operation or request user approval before sensitive actions such as payments, messages or account changes. This adds protection against unintended behavior and attacks such as prompt injection from malicious web content.
Credentials are also separated from the agent. Muse can use stored passwords or payment methods without directly accessing the underlying secrets — giving the agent permission to use credentials rather than exposing them to the model.
Multi-Step Execution
Muse can plan actions, execute them, check the result and adjust subsequent steps when necessary. This requires error handling, verification and recovery. If a website changes unexpectedly or an operation fails, the agent needs to reassess the current situation instead of blindly continuing with the original sequence.
Personal Context
Muse can use information from connected Meta apps. For example, recipes saved on Instagram can be used to create a meal plan and automatically generate a grocery list. This allows the agent to combine existing user data with the current request instead of relying only on information provided in the prompt.
Why Reliability Matters
Long workflows create a compounding reliability problem. If every individual action were 99% reliable, the theoretical probability of completing 30 consecutive actions successfully would be:
0.99³⁰ ≈ 74%
At 98% reliability, it falls to roughly 55%.
This is why verification, retries and re-planning are essential for autonomous agents.
Pricing and Availability
- Free — $0
- Power — $20/month
- Maximum — $100/month
Paid tiers provide higher usage limits. Muse is initially available in the U.S., with a global rollout planned later.
From Chatbots to Agents
The important change isn't another AI model. It's giving the model controlled access to real services so it can execute tasks rather than simply explain how to complete them. Muse represents the shift from AI that answers to AI that acts.
Usman Salis
