# Soniox STT Now Available for Telnyx Voice AI

> Source: <https://telnyx.com/release-notes/soniox-stt-voice-ai>
> Published: 2026-06-03 00:00:00+00:00

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Soniox STT is now available on Telnyx, giving voice AI teams another real-time speech-to-text option for live transcription. Developers can use Soniox for automatic language detection, streaming transcription, and voice agent workflows.

`soniox/stt-rt-v4`

without a language hint when caller language is not known in advance.You can also configure Soniox STT through the Assistants API by setting `transcription.model`

to `soniox/stt-rt-v4`

.

```
curl -X POST https://api.telnyx.com/v2/ai/assistants \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "name": "soniox-stt-assistant",
    "model": "moonshotai/Kimi-K2.5",
    "instructions": "You are a voice assistant for live customer conversations.",
    "transcription": {
      "model": "soniox/stt-rt-v4",
      "language": "auto",
      "settings": {
        "interim_results": true,
        "enable_endpoint_detection": true,
        "max_endpoint_delay_ms": 1000
      }
    }
  }'
```

**Learn more** in the [Telnyx Speech-to-Text models documentation](https://developers.telnyx.com/docs/voice/stt/models).