Fact · Dictation on Windows
Microsoft says its Phi Silica language model is optimized for Copilot+ PCs, where it runs on the neural processing unit.
Checked against its source on October 16, 2026
In the source's own words
“Phi Silica is optimized for efficiency and performance on Windows Copilot+ PCs (where it runs on the NPU)”
Phi Silica in the Windows App SDK, Microsoft Learn, 2026, Introduction.
Open the original- What it measures
- The sentence appears in Microsoft's developer page for Phi Silica, which is exposed through the Windows AI APIs in the Windows App SDK.
- What it does not show
- The same passage says the model is also optimized for non-Copilot+ Windows 11 devices with a supported GPU. The developer page does not name fluid dictation, so the link between this model and the NPU for dictation rests on the voice typing help page that names the same model.