# Nemotron 3.5 ASR API on Opennan

> Nemotron 3.5 ASR API on Opennan: $0.00026 per minute (billed per started minute).

- Maker: NVIDIA
- Category: Voice
- Model id: `nemotron-asr`
- Endpoint: POST https://api.opennan.com/v1/audio/transcriptions
- MCP: https://api.opennan.com/v1/mcp (transcribe_audio)
- Page: https://opennan.com/models/nemotron-asr

## Nemotron 3.5 ASR API prices

| Tier | Opennan | Official | Below official |
| --- | --- | --- | --- |
| Per minute of audio, billed per started minute | $0.00026 | No official price | - |

The maker doesn't sell this exact model on its own API (open weights, or retired there), so there is no official price to compare.

## Call Nemotron 3.5 ASR from code

```bash
curl https://api.opennan.com/v1/audio/transcriptions \
  -H "Authorization: Bearer $OPENNAN_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"nemotron-asr","audio_url":"https://cdn.opennan.com/examples/audio/3f563c93-04da-490f-b9ff-023ea49e3893_example.mp3"}'

# Then poll until "status" is "succeeded" or "failed":
curl https://api.opennan.com/v1/tasks/<task id> -H "Authorization: Bearer $OPENNAN_KEY"
```

## Nemotron 3.5 ASR API questions

### How much does the Nemotron 3.5 ASR API cost?

Nemotron 3.5 ASR API on Opennan: $0.00026 per minute (billed per started minute). Prices are in US dollars per call, shown before you run, and every tier is in the price table.

### What inputs does Nemotron 3.5 ASR take?

Audio.

### Which options can a call set?

Songs up to 30 minutes long.

### How is it billed?

Per minute of audio transcribed, billed per started minute: a 61-second file is billed as 2 minutes.

### What happens if a generation fails?

A failed task is refunded in full. You pay only for results.

### How do I call Nemotron 3.5 ASR from an AI agent?

Add the MCP server https://api.opennan.com/v1/mcp with your API key as a bearer token, then call the transcribe_audio tool with model "nemotron-asr". Or send a POST to https://api.opennan.com/v1/audio/transcriptions.

## Similar models

- [Qwen3-ASR 0.6B](https://opennan.com/models/qwen3-asr-0.6b): from $0.00026 per minute (billed per started minute)
- [Whisper Large v3 Turbo](https://opennan.com/models/whisper-large-v3-turbo): from $0.00026 per minute (billed per started minute)
- [Qwen3-ASR 1.7B](https://opennan.com/models/qwen3-asr-1.7b): from $0.000585 per minute (billed per started minute)
- [Whisper Large v3](https://opennan.com/models/whisper-large-v3): from $0.000585 per minute (billed per started minute)
- [Voxtral Small 24B](https://opennan.com/models/voxtral-small): from $0.0039 per minute (billed per started minute)
- [Kokoro](https://opennan.com/models/kokoro): from $1.287 per 1M characters