Fact · Speech recognition
OpenAI's Realtime guide says that a shorter silence duration setting for voice activity detection means a turn is detected as ended more quickly.
Checked against its source on October 17, 2026
In the source's own words
“With shorter values turns will be detected more quickly.”
Voice activity detection (VAD), OpenAI Realtime API, OpenAI, OpenAI Developers, n.d., Turn detection settings.
Open the original- What it measures
- The setting is silence_duration_ms, used in the server voice activity detection mode.
- What it does not show
- The guide does not give a default in this passage, and a shorter value also makes early cut-offs more likely.