Soniox TTS v2
Soniox’s text-to-speech, the companion to its v5 STT, aimed at multilingual voice agents.
Model idtts-rt-v2
Price$4 in, $21.50 out per 1M tokens
Checked29 September 2026
Where it stands
36newer speech and audio models since its release
- NVIDIA Nemotron 3.5 Transcribe (30B-A4B)28 Oct 2026
- Hy-SimulMT-30B-A3B22 Oct 2026
- Eleven Realtime v1 Max / Mini20 Oct 2026
- Voxtral Mini Transcribe 3 (+ Mini Transcribe Realtime 3)20 Oct 2026
- Voxtral Small Transcribe 320 Oct 2026
The 5 newest are listed. All speech and audio models
- Before it from Soniox
- Soniox v5 (Async and Real-Time STT)11 Jun 2026
- Weights
- Closed weights; access is hosted only.
How to call it
Where to use Soniox TTS v2, with its model id.
| Provider | Model id | Endpoint | Docs |
|---|---|---|---|
| Soniox API (real-time streaming, WebSocket) | tts-rt-v2 |
soniox.com |
Pricing
| Input | $4 per 1M tokens |
|---|---|
| Output | $21.50 per 1M tokens |
As published: “USD per 1M tokens (text in / audio out); ≈ $0.70 per hour of generated speech (1 hour ≈ 30,000 audio tokens)”.
Source: soniox.com, checked 29 September 2026.
Specs
- Input
- Text and audio
- Output
- Audio
- Context window
- Not published
- Max output
- Not published
- Open weights
- No
- Licence
- Proprietary
- Released
- 10 August 2026
- Status
- Current
- Type
- Speech and audio
What stands out
What its maker marketed at launch, and what people found later, each with its source.
60+ languages in one model, mid-sentence switching
Single multilingual model with mixed-language text and mid-sentence language switching; Soniox claims ‘hallucination-free’ output (no invented or dropped words) and accurate reading of emails, phone numbers and IDs.
Audio tags and 20-second voice cloning (v2)
TTS v2 adds expressive audio tags (whispering, laughter, hesitation, excitement), voice cloning from ~20 s of reference audio, and character-level timestamps.
Notes
Soniox launched TTS on 2026-04-23 (tts-rt-v1); TTS v2 (tts-rt-v2, replacing v1) was reported by audioXpress on 2026-08-10. Streaming only; regions US, EU, Japan. The v2 date is from secondary press, not a Soniox post.
Sources: https://soniox.com/blog/soniox-text-to-speech , https://soniox.com/pricing , https://audioxpress.com/news/soniox-tts-v2-adds-expressive-control-and-voice-cloning-to-its-multilingual-voice-ai-platform