Fact · Dictation on Windows
Microsoft describes SAPI as an application programming interface that reduces the code an application needs to use both speech recognition and text-to-speech.
Checked against its source on October 16, 2026
In the source's own words
“The SAPI application programming interface (API) dramatically reduces the code overhead required for an application to use speech recognition and text-to-speech”
Speech API Overview (SAPI 5.4), Microsoft Learn, n.d., Speech API Overview, opening paragraph.
Open the original- What it measures
- SAPI is the native Windows interface an application calls to recognize speech or speak text, so the app does not have to build its own speech engine. The overview covers both halves of the API.
- What it does not show
- The overview is archived under previous-versions and written for SAPI 5.4. It does not say which recognizer engines ship with a given Windows version.