Model reference · open weights
oa is an open-weight audio or speech model from cocktailpeanut. AxForge deploys and operates it for you on dedicated EU-owned hardware — with the licence handled where one is required.
Available as managed deployment — configured and operated for you on dedicated EU hardware, quoted per deployment.
What it is
| Released by | cocktailpeanut |
|---|---|
| Type | Audio & music |
| Task | Text→speech |
| Released | 2025-06-04 |
| Popularity | 2k downloads / month |
| Licence | Commercial licence needed |
About
OpenAudio S1 is a leading text-to-speech (TTS) model trained on more than 2 million hours of audio data in multiple languages.
Supported languages:
Please refer to Fish Speech Github for more info. Demo available at Fish Audio Playground. Visit the OpenAudio website for blog & tech report.
OpenAudio S1 supports a variety of emotional, tone, and special markers to enhance speech synthesis:
1. Emotional markers: (angry) (sad) (disdainful) (excited) (surprised) (satisfied) (unhappy) (anxious) (hysterical) (delighted) (scared) (worried) (indifferent) (upset) (impatient) (nervous) (guilty) (scornful) (frustrated) (depressed) (panicked) (furious) (empathetic) (embarrassed) (reluctant) (disgusted) (keen) (moved) (proud) (relaxed) (grateful) (confident) (interested) (curious) (confused) (joyful) (disapproving) (negative) (denying) (astonished) (serious) (sarcastic) (conciliative) (comforting) (sincere) (sneering) (hesitating) (yielding) (painful) (awkward) (amused)
2. Tone markers: (in a hurry tone) (shouting) (screaming) (whispering) (soft tone)
3. Special markers: (laughing) (chuckling) (sobbing) (crying loudly) (sighing) (panting) (groaning) (crowd laughing) (background laughter) (audience laughing)
Special markers with corresponding onomatopoeia:
OpenAudio S1 includes the following models:
Both S1 and S1-mini incorporate online Reinforcement Learning from Human Feedback (RLHF).
Seed TTS Eval Metrics (English, auto eval, based on OpenAI gpt-4o-transcribe, speaker distance using Revai/pyannote-wespeaker-voxceleb-resnet34-LM):
This model is permissively licensed under the CC-BY-NC-SA-4.0 license.
From the published model card. Full card on the HuggingFace links in the sidebar.
How it works
Using it via the API
Once AxForge deploys oa for you, it answers on the OpenAI-compatible API — the same base URL and keys as every other model. (oa below is illustrative; you get the exact model name on deployment.)
$ curl -sS https://api.axforge.ai/v1/audio/transcriptions \ -H "Authorization: Bearer $AXFORGE_API_KEY" \ -F model="oa" -F file=@audio.mp3
Create an account — your API key is available in the console. 3M free tokens every 30 days with every new account.