Fact · Voice and AI
more than 8times slower
On a Raspberry Pi 4, Whisper takes about 8 seconds per command and Speech-to-Phrase takes under one second, so Whisper is more than eight times slower.
Checked against its source on October 17, 2026
- How it is calculated
- 8 seconds divided by a time under 1 second is more than 8
Calculated from
- Home Assistant's documentation says Whisper takes around 8 seconds to process a voice command on a Raspberry Pi 4 and under a second on an Intel NUC.
- Home Assistant says Speech-to-Phrase, a closed-ended model that transcribes only what it knows, transcribes in under one second even on a Home Assistant Green or Raspberry Pi 4.