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Overview Models Agents Tools Audio & voice Production API reference

Create voice

POST
/audio/voices

Creates a voice from a text prompt or from a consent recording and an audio sample.

For prompt-based creation, send type: "prompt" with a name and prompt as JSON or multipart form data. For creation from an audio sample, send type: "audio_sample" with a name, audio_sample, and consent recording ID as multipart form data. The type defaults to audio_sample when omitted.

Returns the saved voice’s metadata. Voices created from text prompts are supported only in Live, not in Realtime or the speech endpoint. The response does not include preview audio.

Body Parameters
JSON
name: string

The name of the new voice.

minLength1
maxLength256
prompt: string

A description of the desired voice. Must not contain only whitespace.

minLength1
maxLength2000
type: "prompt"

Set to prompt to create a voice from a text description.

model: optional string or "auto" or "2026-10-08"

The voice creation model to use. Defaults to auto.

One of the following:
string
"auto" or "2026-10-08"

The voice creation model to use. Defaults to auto.

One of the following:
"auto"
"2026-10-08"
script_hint: optional string

Optional text for the voice to speak during creation. If omitted, a script is generated from the prompt. Must not be blank after trimming whitespace; scripts that are too short are rejected.

minLength1
maxLength2000
Returns
Voice object { id, created_at, name, 3 more }

A custom voice that can be used for audio output. Voices created from text prompts are supported only in Live.

id: string

The voice identifier, which can be referenced in API endpoints.

created_at: number

The Unix timestamp (in seconds) for when the voice was created.

formatunixtime
name: string

The name of the voice.

object: "audio.voice"

The object type, which is always audio.voice.

type: "audio_sample" or "prompt"

How the voice was created.

One of the following:
"audio_sample"
"prompt"
prompt: optional string

The original text prompt used to create the voice. Present for prompt-generated voices with a stored prompt; omitted for audio-sample voices and older voices without a stored prompt.

Create voice

curl https://api.tpg-oai.studydeckedu.com/v1/audio/voices \
  -X POST \
  -H "Authorization: Bearer $OPENAI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "type": "prompt",
    "name": "Warm narrator",
    "prompt": "A warm, calm narrator with a clear, measured delivery.",
    "model": "auto"
  }'
200 example
{
  "id": "id",
  "created_at": 0,
  "name": "name",
  "object": "audio.voice",
  "type": "audio_sample",
  "prompt": "prompt"
}
Returns Examples
200 example
{
  "id": "id",
  "created_at": 0,
  "name": "name",
  "object": "audio.voice",
  "type": "audio_sample",
  "prompt": "prompt"
}