Resemble AIFastHigh

Chatterbox Turbo

Resemble AI's fastest open-source TTS without sacrificing quality. 20 pre-made voices, paralinguistic tags like [sigh] and [chuckle], and optional instant voice cloning from 5s+ reference audio. Max 500 characters per request.

59 credits

per 1000 characters (0.057 credits/char, billed per character)

Fastest open-source TTS quality tier

Paralinguistic tags: [sigh], [chuckle], [cough], [clear throat]

20 pre-made voices

Instant voice cloning from 5s+ reference audio

Very low per-character price

Run it right now

Test this model instantly in the Console Playground — no code required

Use with AI Assistant

Copy usage instructions for Claude, ChatGPT, or other AI

llms.txtllms.txt ↗

Quick Start

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "resemble-ai/chatterbox-turbo",
  "input": {
    "text": "Oh, that's hilarious! [chuckle] Anyway, we do have a new model in store. Would you like me to get some prices for you?",
    "voice": "Laura",
    "temperature": 0.8
  }
}'

Parameters

Parameter	Type	Required	Default	Description
`text`	string	Yes	-	Text to synthesize (max 500 characters). Supports tags like [sigh], [chuckle], [cough]
`voice`	string	No	Andy	Pre-made voice. Ignored if reference_audio is provided AaronAbigailAnayaAndyArcherBrianChloeDylanEmmanuelEthanEvelynGavinGordonIvanLauraLucyMadisonMarisolMeeraWalter
`reference_audio`	string	No	-	Reference audio for voice cloning (must be longer than 5 seconds). Overrides voice
`temperature`	number	No	0.8	Controls randomness (0.05-2.0). Higher produces more varied speech
`top_p`	number	No	0.95	Nucleus sampling threshold (0.5-1.0). Lower is more focused
`top_k`	integer	No	1000	Limits vocabulary to top k tokens (1-2000)
`repetition_penalty`	number	No	1.2	Penalizes token repetition (1.0-2.0)
`seed`	integer	No	-	Random seed for reproducible results. Leave blank for random

How to Provide File Input

There are 3 ways to provide files for the reference_audio parameter:

Recommended

Direct Upload (Multipart)

Attach files directly to POST /v1/predictions/upload. No separate upload step needed.

curl -X POST "https://api.core.today/v1/predictions/upload" \
  -H "X-API-Key: cdt_your_api_key" \
  -F "model=resemble-ai/chatterbox-turbo" \
  -F 'input={"prompt":"your prompt here"}' \
  -F "file:reference_audio=@your_file.png"

Image URL

Pass a publicly accessible URL directly. You can also use file_url from the Storage API.

{
  "model": "resemble-ai/chatterbox-turbo",
  "input": {
    "prompt": "your prompt here",
    "reference_audio": "https://example.com/image.jpg"
  }
}

See the File Upload docs for more upload methods including Presigned URLs.

Common Parameters

Common parameters used when calling POST /v1/predictions.

Parameter	Type	Required	Default	Description
`model`	string	Yes	-	Model identifier
`input`	object	Yes	-	Object containing the model-specific parameters from the table above
`output_folder`	string	No	-	Folder path for output files (max 256 chars, '..' not allowed)
`webhook_url`	string	No	-	Webhook URL to call on completion
`is_public`	boolean	No	false	If true, output files are also available via permanent public URLs

Examples

Natural Conversational Reply

Customer-service style reply with paralinguistic tags

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "resemble-ai/chatterbox-turbo",
  "input": {
    "text": "Oh, that's hilarious! [chuckle] Anyway, we do have a new model in store. Would you like me to get some prices for you?",
    "voice": "Laura",
    "temperature": 0.8
  }
}'