Mu by Microsoft is a new ~330M on-device SLM that runs on the NPU in Copilot+ PCs. It powers the new agent in Windows Settings, delivering high speed and efficiency for local AI tasks.
Hi everyone!
On-device AI is developing at an incredible pace lately. We keep seeing models that are smaller, yet more powerful, and specifically optimized for edge devices and chips. This is great news, especially for developers building privacy-focused applications or new AI hardware.
Microsoft's new model, Mu, is built for exactly this kind of on-device work. It's a small language model that runs locally on the NPU in Copilot+ PCs, and it's incredibly fast, powering the new agent in Windows Settings.
What’s really exciting here is that this is just the first step. Mu gets its capabilities through distillation from the larger Phi models. This signals a future where on-device AI can keep getting smarter without a huge increase in size.
It's seriously making me think it might be a very good time to get a Copilot+ PC.👀
About Mu on Product Hunt
“Fast, local AI comes to Windows Copilot+ PCs”
Mu launched on Product Hunt on June 24th, 2025 and earned 130 upvotes and 3 comments, placing #22 on the daily leaderboard. Mu by Microsoft is a new ~330M on-device SLM that runs on the NPU in Copilot+ PCs. It powers the new agent in Windows Settings, delivering high speed and efficiency for local AI tasks.
On the analytics side, Mu competes within PC, Artificial Intelligence and Development — topics that collectively have 479.9k followers on Product Hunt. The dashboard above tracks how Mu performed against the three products that launched closest to it on the same day.
Who hunted Mu?
Mu was hunted by Zac Zuo. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Mu including community comment highlights and product details, visit the product overview.
Zac Zuo