stt-rt-preview-v2

soniox/stt-rt-preview-v2

Second real-time preview from Soniox, released August 5, 2025 with higher accuracy, translation across all language pairs and more reliable automatic language switching. Retired October 31, 2025, when the name was aliased to stt-rt-v3.

Get API Key Read the Docs

curl "$AUDIOLAB_API_URL/v1/audio/transcriptions" \
  -H "Authorization: Bearer $AUDIOLAB_API_KEY" \
  -F 'model=soniox/stt-rt-preview-v2' \
  -F 'file=@recording.wav'

Input Price: $0.0017 / minute
Output Price: —
Input: Audio
Output: Text

Capabilities

Explore what stt-rt-preview-v2 supports, then use the API section for a request tailored to this model.

BatchStreamPricing estimated

Model Information

Provider: Soniox
Product: Speech-to-Text
Release Date: Aug 5, 2025
Data Policy: Not specified
Region: US
Input: Audio
Output: Text

Provider Documentation

Playground

Try stt-rt-preview-v2 by Soniox. Requests use the selected workspace’s credits and API pricing.

stt-rt-preview-v2

Attach an audio file to turn speech into text.

Providers

Compare available endpoints, pricing, and context limits for stt-rt-preview-v2.

Provider	Context	Output	Input Price	Output Price	Endpoint
Soniox	Not specified	Text	$0.0017 / minute	—	`soniox/stt-rt-preview-v2:soniox`

Prices are catalog rates. Your workspace’s estimate and endpoint pricing determine the final charge.

Input and Output Limits

Formats and limits AudioLab enforces on each request.

Limit	Value
Max seconds	3600
Formats	wav, mp3, flac, m4a, ogg, webm

Performance

Uptime100%

LatencyMedianP901.00 s

Throughput—

Performance

Status

Current catalog availability. Your workspace’s access is checked separately before a request runs.

Checking availability…

A live availability check is not available right now.

Getting Started

Use your workspace API key and the exact model identifier below. Set the API URL to the endpoint shown in your workspace and keep credentials on your server.

curl "$AUDIOLAB_API_URL/v1/audio/transcriptions" \
  -H "Authorization: Bearer $AUDIOLAB_API_KEY" \
  -F 'model=soniox/stt-rt-preview-v2' \
  -F 'file=@recording.wav'

Read the Endpoint Reference

Request Parameters

Available parameters depend on the provider and request format. The endpoint reference explains accepted values and required fields.

Parameter	Details
`model`	`soniox/stt-rt-preview-v2` — Required model identifier.

Input and Output Limits

Formats and limits AudioLab enforces on each request.

Limit	Value
Max seconds	3600
Formats	wav, mp3, flac, m4a, ogg, webm

Similar Models

Explore more speech-to-text and compare their capabilities.

Model	Context	Input Price	Output Price
STT Realtime v5Soniox	Not specified	$0.0017 / minute	—
STT Async v5Soniox	Not specified	$0.0014 / minute	—
stt-rt-v4Soniox	Not specified	$0.0017 / minute	—
stt-async-v4Soniox	Not specified	$0.0014 / minute	—
stt-async-v3Soniox	Not specified	$0.0014 / minute	—
stt-rt-v3Soniox	Not specified	$0.0017 / minute	—

View All Speech-to-Text