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Transcriber (STT)

Deepgram

Deepgram Nova-3 is the recommended STT provider for production deployments — best-in-class accuracy with an average latency of 83ms and 37 language codes including 15+ Arabic dialect variants.

Requires: Deepgram API key in Settings → Credentials

Models

Model	Use Case
nova-3	Recommended — highest accuracy
nova-3-medical	Healthcare terminology

Configuration

Code
{
  "transcriber": {
    "provider": "deepgram",
    "model": "nova-3",
    "language": "en-US",
    "detect_language": false,
    "smart_format": true,
    "punctuate": true,
    "numerals": false,
    "enable_diarization": false,
    "keyterms": ["Acme Corp", "Product Name"],
    "interim_results": true,
    "endpointing_ms": 25,
    "filler_words": true,
    "profanity_filter": false,
    "mip_opt_out": false
  }
}

Fields

Field	Default	Description
model	nova-3	STT model
language	en-US	Language code (see list below)
detect_language	false	Auto-detect language (disables language)
smart_format	true	Format numbers, dates, addresses
punctuate	true	Add punctuation
numerals	false	Convert spoken numbers to digits
enable_diarization	false	Identify different speakers
keyterms	null	Terms to boost recognition (Nova-3 only)
interim_results	true	Return partial transcripts during streaming
endpointing_ms	25	Silence before utterance end detection (10–5000ms)
filler_words	true	Include "um", "uh" in transcripts
profanity_filter	false	Filter profanity from output
mip_opt_out	false	Opt out of Deepgram's model improvement program

Language Codes

37 supported codes:

English: en, en-US, en-GB, en-AU

Arabic (15+ dialects): ar, ar-AE, ar-SA, ar-EG, ar-QA, ar-KW, ar-JO, ar-LB, ar-SY, ar-IQ, ar-MA, ar-DZ, ar-TN, ar-PS, ar-SD, ar-TD, ar-IR

Other: es, es-419, fr, de, it, pt, pt-BR, nl, hi, ru, ja, zh, ko, tr, uk, pl, vi

Multilingual (any language): multi

Keyterms (Nova-3)

Boost recognition of domain-specific terms:

Code
{
  "transcriber": {
    "provider": "deepgram",
    "model": "nova-3",
    "keyterms": ["Neuratel", "gpt-4.1", "Nova-3", "SKU-12345"]
  }
}

Terms are case-insensitive. List up to 100 keyterms per agent.

Related

• OpenAI STT — Whisper-based alternative
• Phantom STT — coming soon