LiteLLMModels

STT Async V4 API Pricing

As of October 10, 2026, STT Async V4 costs $0 per minute of audio on Soniox. It has an 8,000-token context window and returns up to 8,000 tokens per response.

Model ID soniox/stt-async-v4Prices updated Checked
Per second
$0.00002778
Per minute
$0
Context window
8,000 tokens
Max output
8,000 tokens
Providers
1
Added to LiteLLM
June 2026

STT Async V4 pricing by provider

1 listing across 1 provider. Token prices are in US dollars per 1M tokens. The highlighted row is the price quoted above.

ProviderModel name in LiteLLMPer secondPer minuteContext
Sonioxsoniox/stt-async-v4$0.00002778$08K

What STT Async V4 costs in practice

Transcribing 1,000 minutes of audio

Soniox$0

STT Async V4 features

Use STT Async V4 with LiteLLM

Call STT Async V4 through the LiteLLM Python SDK, or put it behind the LiteLLM proxy and send OpenAI-format requests to /v1/audio/transcriptions. LiteLLM tracks the cost of every request at these prices.

Python SDK
from litellm import transcription

response = transcription(
    model="soniox/stt-async-v4",
    file=open("audio.mp3", "rb"),
)
Proxy config.yaml
model_list:
  - model_name: stt-async-v4
    litellm_params:
      model: soniox/stt-async-v4
      # credentials: see the provider's LiteLLM docs page
Call the proxy
curl http://0.0.0.0:4000/v1/audio/transcriptions \
  -H "Authorization: Bearer sk-1234" \
  -F model="stt-async-v4" \
  -F file=@audio.mp3

STT Async V4 FAQ

How much does STT Async V4 cost?

STT Async V4 costs $0 per minute of audio on Soniox.

What is the context window of STT Async V4?

STT Async V4 has an 8,000-token context window and returns up to 8,000 tokens per response.

Which providers offer STT Async V4?

STT Async V4 is available from Soniox through LiteLLM, using the model name soniox/stt-async-v4.

How do I call STT Async V4 with an OpenAI-compatible API?

Use the LiteLLM Python SDK with model="soniox/stt-async-v4", or add the model to the LiteLLM proxy's config.yaml and send requests to /v1/audio/transcriptions from any OpenAI client. LiteLLM tracks the cost of every request at the prices on this page.

What features does STT Async V4 support?

STT Async V4 supports audio input.

When did LiteLLM add STT Async V4?

STT Async V4 was added to LiteLLM's model price file in June 2026.

Sources

Prices come from LiteLLM's open-source model_prices_and_context_window.json, which LiteLLM uses to calculate the cost of every request. Provider pricing pages:

LiteLLM docs: Soniox.

Provider pages: Soniox.