OpenAI (Beta)

OpenAI provides natural-sounding text-to-speech with customizable voice instructions and multiple voice options.

The following example shows a starting tts parameter configuration you can use when you Start a conversational AI agent.

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"tts": {

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"vendor": "openai",

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"params": {

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"api_key": "<llm_api_key_openai>",

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"model": "gpt-4o-mini-tts",

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"voice": "coral",

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"instructions": "Please use standard American English, natural tone, moderate pace, and steady intonation",

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"speed": 1

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}

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}

paramsrequired

• api_key stringrequired

  The API key used for authentication. Get your API key from the OpenAI Console.

• model stringrequired

  Identifier of the model to be used.

• voice stringrequired

  The voice identifier for speech synthesis.

• instructions stringnullable

  Custom instructions for voice style, accent, pace, and tone. Helps fine-tune the speech characteristics.

• speed numbernullable

  Default: 1.0

  Speaking rate multiplier. Values between 0.25 and 4.0, where 1.0 is normal speed.

For advanced configuration options, available voices, and detailed parameter descriptions, see the OpenAI TTS documentation.