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nvidia/

Nemotron-3-Diarization-preview

$0.00060

/ minute

Nemotron 3 Diarization is an open-weight streaming Sortformer model, engineered for low-latency speaker diarization across up to 8 speakers, ordered by arrival time. It powers meeting transcription, call analytics, and voice-agent pipelines—resolving who spoke when with generic speaker labels and timestamps in a single streaming pass, offline or in real time.

Public
Zero retention
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api

Input

Please upload an audio file

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Settings

ServiceTier

The service tier used for processing the request. 'priority' processes the request with higher priority (premium rate); 'flex' processes it at lower priority for a discount, served only when spare capacity exists and may be retried/timed out under load. Both apply only to models that support the respective tier. For compatibility, 'auto' is treated as 'priority' and 'standard_only' as 'default'.

Fail Fast

If true, the request is rejected immediately with HTTP 429 when the model has no spare capacity, instead of waiting in the queue. Opt-in; the default (false) keeps standard queueing behavior.

Task

task to perform

Initial Prompt

optional text to provide as a prompt for the first window.. (Default: empty)

Temperature

temperature to use for sampling (Default: 0)

Language

language that the audio is in; uses detected language if None; use two-letter language code (ISO 639-1) (e.g. en, de, ja)

Chunk Level

chunk level, either 'segment' or 'word'

Chunk Length S

chunk length in seconds to split audio (Default: 30, 1 ≤ chunk_length_s ≤ 30)

Output

1 speaker

0

0.00s – 5.00s

Model Information

Nemotron-3 Diarization

Nemotron-3 Diarization is NVIDIA's open-weight streaming Sortformer speaker-diarization model. It determines "who spoke when" in conversational audio — meetings, calls, podcasts, and speech-recognition pipelines that need generic speaker labels and timestamps.

Highlights

  • Streaming and offline inference from a single checkpoint (latency profiles from an 80 ms buffer to a 30.4 s offline buffer).
  • Up to 8 speakers, ordered by each speaker's first arrival in the audio.
  • 16 kHz input; 10 ms output resolution, postprocessed into speaker segments.
  • Uses the Arrival-Order Speaker Cache (AOSC) and a FIFO queue for streaming context.

Usage

POST /v1/inference/nvidia/Nemotron-3-Diarization-preview with a multipart audio field. Response:

{
  "segments": [{"start": 0.0, "end": 4.0, "speaker": "speaker_0"}],
  "num_speakers": 3,
  "duration": 22.5
}

References

License

Use of this model is governed by the NVIDIA Software and Model Evaluation License.