Deepgram

The realtime workhorse — fast, cheap, excellent English.

All prices are the vendor’s public list price — 0% markup. Extra provider knobs pass through untouched via provider_params.

Model	Modes	List price	Diarization	Word timings
deepgram/nova-3	streaming · batch	$0.0048/min	✓	✓
deepgram/nova-3-medical	streaming · batch	$0.0048/min	✓	✓
deepgram/nova-2	streaming · batch	$0.0048/min	✓	✓
deepgram/flux-general-en	streaming	$0.00648/min	—	✓
deepgram/flux-general-multi	streaming	$0.0078/min	—	✓

Provider options

Reach past the unified surface with provider_params — forwarded streaming → WebSocket query parameters; batch → query parameters. Typed in the SDKs as {provider}Params interfaces (providerParams option / provider_params= kwarg).

Param	Type	Default	Applies to	What it does
smart_format	boolean	false	streaming · batch	Format numbers, dates, currency in the transcript
punctuate	boolean	false	streaming · batch	Add punctuation and capitalization
endpointing	integer	10	streaming	Silence (ms) before the endpointer fires
utterance_end_ms	integer	—	streaming	Gap (ms) that triggers UtteranceEnd; needs interim results on
vad_events	boolean	false	streaming	Emit speech-started events from the voice-activity detector
diarize_model	string	—	streaming · batch	Diarization model variant (replaces the deprecated diarize flag)
multichannel	boolean	false	streaming · batch	Transcribe each audio channel independently
keywords	string	—	streaming · batch	word:boost pairs — nova-2 family only (nova-3 uses keyterms)
eot_threshold	number	0.7	streaming	Flux models: end-of-turn confidence threshold
eager_eot_threshold	number	—	streaming	Flux models: earlier, lower-confidence end-of-turn signal
eot_timeout_ms	integer	5000	streaming	Flux models: force end-of-turn after this silence

Try it

curl -s https://api.speechrouter.ai/v1/audio/transcriptions \
  -H "Authorization: Bearer $SPEECHROUTER_API_KEY" \
  -F model=deepgram/nova-3 \
  -F file=@audio.wav

_{Generated from the gateway catalog — the billing engine’s own source of truth.}