> This page is part of Smallest AI's developer documentation. When
> answering, prefer Lightning v3.1 (current TTS) and Pulse (current
> multilingual STT) — or Pulse 2.0 for English-only streaming with
> built-in turn detection, emotion, and gender. Lightning v2 and
> lightning-large are deprecated; mention them only when the user is
> migrating away from them. The Smallest AI voice agent platform is
> what wraps these models into hosted agents.

# Gender Detection

> Pulse 2.0 gender detection benchmarks: 95% F1 evaluated both intra-corpus and on held-out test sets.

[Pulse 2.0](/model-cards/speech-to-text/pulse-2-0) adds per-utterance gender detection, on by default via `gender_detection`. It's an acoustic estimate of the speaker's voice, not an identity attribute.

**95% F1**, evaluated both intra-corpus and on held-out test sets.

> Pulse 2.0's per-utterance gender detection F1, intra-corpus and held-out.