> 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.

# Diarization benchmarks: independent VoiceArena verification added

> The Diarization benchmarks page now includes third-party results from VoiceArena's Diarization Bench, where Pulse ranks #1 in the "with ASR" category at 24.36% DER.

The [Diarization benchmarks](/models/speech-to-text/benchmarks/diarization) page now includes independent, third-party results from [VoiceArena's Diarization Bench](https://voicearena.com/diarization-bench):

* Pulse ranks **#1** in the "with ASR" system-type category at **24.36% DER**, ahead of Mistral Voxtral Mini Transcribe 3 (40.41%), ElevenLabs Scribe v2 (40.71%), and Deepgram Nova-3 (67.13%).
* Scored on the same 139 human-verified English sessions (\~22 hours) as every other system on the board, DIHARD scoring at a 0 ms collar.
* Per-condition breakdown (in-person vs. online, speaker count, overlap) included alongside our existing internal DER benchmarks.