Models

KugelAudio currently exposes Kugel 3 as the canonical production TTS model for new integrations.

New here? Use kugel-3. It supports voice cloning, streaming, multilingual generation, IPA, timestamps, and break tags.

Current model

Model ID	Name	Best for
`kugel-3`	Kugel 3	Voice agents, narration, brand voices, streaming, and multilingual TTS

Legacy model IDs

Older integrations may still send previous model IDs. These IDs remain accepted for backwards compatibility, but new integrations should use kugel-3.

Legacy `model_id`	Status
`kugel-2.5`	Accepted for backwards compatibility
`kugel-2-turbo`	Accepted for backwards compatibility
`kugel-2`	Accepted for backwards compatibility
`kugel-1`	Accepted for backwards compatibility
`kugel-1-turbo`	Accepted for backwards compatibility

Legacy requests may route through the current production model, but billing and Dashboard usage keep the requested model_id visible for auditability. Use kugel-3 in new integrations for the clearest reporting.

Example

Python
JavaScript
cURL

audio = client.tts.generate(
    text='Welcome to KugelAudio. <break time="400ms"/> How can I help you today?',
    model_id="kugel-3",
    cfg_scale=2.0,
)

const audio = await client.tts.generate({
  text: 'Welcome to KugelAudio. <break time="400ms"/> How can I help you today?',
  modelId: 'kugel-3',
  cfgScale: 2.0,
});

curl -X POST https://api.kugelaudio.com/v1/tts/generate \
  -H "Authorization: Bearer $KUGELAUDIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "text": "Welcome to KugelAudio. <break time=\"400ms\"/> How can I help you today?",
    "model_id": "kugel-3",
    "cfg_scale": 2.0
  }' \
  --output output.pcm

Capabilities

Capability	`kugel-3`
Voice cloning (zero-shot)	Supported
IPA custom pronunciation	Supported
Built-in text normalization	Supported
Input text streaming	Supported
Output audio streaming	Supported
Word-level timestamps	Supported
Multilingual TTS	39 languages, single multilingual model
Break tags (`break` element)	Supported
Sample rate	24 kHz native; 8 kHz, 16 kHz, 22.05 kHz, and 24 kHz output options
Max input length	10,000 characters

Listing models

GET /v1/models returns canonical current models only. Legacy IDs are accepted for backwards compatibility, but they are not included in this endpoint response.

Python
JavaScript
cURL

models = client.models.list()

for model in models:
    print(f"{model.id}: {model.name}")

const models = await client.models.list();

for (const model of models) {
  console.log(`${model.id}: ${model.name}`);
}

curl https://api.kugelaudio.com/v1/models \
  -H "Authorization: Bearer $KUGELAUDIO_API_KEY"

Get started

Build a voice agent

Generate audio

Voices

Deploy

SDK Reference

API Reference

Current model

Legacy model IDs

Example

Capabilities

Listing models

​Current model

​Legacy model IDs

​Example

​Capabilities

​Listing models

Current model

Legacy model IDs

Example

Capabilities

Listing models