Create speech (OpenAI TTS)

Generates audio from text using OpenAI TTS. Supports streaming via SSE when stream_format is set to ‘sse’.

Note: This endpoint also works without the /v1 prefix (e.g., /openai/audio/speech).

POST /openai/v1/audio/speech

Error

A valid request URL is required to generate request examples

200

"<string>"

Authorizations

BearerAuthBasicAuthVirtualKeyAuthApiKeyAuth

Authorization · string · header · required

Bearer token authentication. Use your provider API key or Bifrost authentication token. Virtual keys (prefixed with sk-bf-) can also be passed here.

Body

application/json

model · string · required

Model identifier (e.g., tts-1, tts-1-hd)

Example:

"tts-1"

input · string · required

Text to convert to speech

voice · enum<string>

Voice to use

Available options: alloy, echo, fable, onyx, nova, shimmer

response_format · enum<string>

Available options: mp3, opus, aac, flac, wav, pcm

speed · number

Required range: 0.25 <= x <= 4

stream_format · enum<string>

Set to 'sse' for streaming

Available options: sse

fallbacks · string[]

Response

200

audio/mpeg

Successful response

The response is of type file.