Gemini 3.1 Flash TTS

curl --request POST \
  --url https://api.vidgo.ai/api/generate/submit \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "google/gemini-3.1-flash/text-to-speech",
  "input": {
    "text": "Welcome to the studio. [short pause] Let us tell your story.",
    "style_instructions": "Warm narration with a relaxed pace.",
    "voice": "Kore",
    "temperature": 1,
    "output_format": "mp3"
  }
}
'

{
  "code": 200,
  "data": {
    "task_id": "task-unified-example",
    "status": "running",
    "created_time": "2026-09-10T08:00:00"
  }
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

Request timeout

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

{
  "detail": "<string>"
}

Generate speech with Gemini 3.1 Flash TTS, using style instructions and selectable voices for narration or dialogue with two speakers.

​

Models

• google/gemini-3.1-flash/text-to-speech - Convert text into speech.

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Features

• Convert text into speech.
• Use one voice or two speaker aliases.
• Control delivery with style_instructions and temperature.
• Select a voice with voice and specify the spoken language with language_code.

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Output Options

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Output Format

• output_format: Optional. Accepted values: mp3, wav, ogg_opus. Default: mp3.

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Advanced Parameters

Set model and optional callback_url at the request root. Place all workflow parameters, including output options, inside input. Use the fields in the parameter reference to configure speech generation.

• When supplying speakers, provide exactly two distinct speaker_id aliases using only letters, digits, and underscores. Speech uses the voice assigned to each speaker.

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Text

• text: Required. Supply the text to speak. Length: 1-50,000 characters.
• Include the words to speak, with optional audio tags such as [short pause], [whispering], and [laughing]. For dialogue, prefix each turn with its matching speaker_id followed by a colon.

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Style Instructions

• style_instructions: Optional. Describe how the speech should be delivered.

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Voice

• voice: Optional. Select the voice. String. Default: Kore.

Supported voice values

• Achernar
• Achird
• Algenib
• Algieba
• Alnilam
• Aoede
• Autonoe
• Callirrhoe
• Charon
• Despina
• Enceladus
• Erinome
• Fenrir
• Gacrux
• Iapetus
• Kore
• Laomedeia
• Leda
• Orus
• Pulcherrima
• Puck
• Rasalgethi
• Sadachbia
• Sadaltager
• Schedar
• Sulafat
• Umbriel
• Vindemiatrix
• Zephyr
• Zubenelgenubi

​

Language Code

• language_code: Optional. Select a value below, or omit it to detect the language from text.

Supported language code values

• Arabic (Egypt)
• Bangla (Bangladesh)
• Dutch (Netherlands)
• English (India)
• English (US)
• French (France)
• German (Germany)
• Hindi (India)
• Indonesian (Indonesia)
• Italian (Italy)
• Japanese (Japan)
• Korean (South Korea)
• Marathi (India)
• Polish (Poland)
• Portuguese (Brazil)
• Romanian (Romania)
• Russian (Russia)
• Spanish (Spain)
• Tamil (India)
• Telugu (India)
• Thai (Thailand)
• Turkish (Turkey)
• Ukrainian (Ukraine)
• Vietnamese (Vietnam)
• Afrikaans (South Africa)
• Albanian (Albania)
• Amharic (Ethiopia)
• Arabic (World)
• Armenian (Armenia)
• Azerbaijani (Azerbaijan)
• Basque (Spain)
• Belarusian (Belarus)
• Bulgarian (Bulgaria)
• Burmese (Myanmar)
• Catalan (Spain)
• Cebuano (Philippines)
• Chinese Mandarin (China)
• Chinese Mandarin (Taiwan)
• Croatian (Croatia)
• Czech (Czech Republic)
• Danish (Denmark)
• English (Australia)
• English (UK)
• Estonian (Estonia)
• Filipino (Philippines)
• Finnish (Finland)
• French (Canada)
• Galician (Spain)
• Georgian (Georgia)
• Greek (Greece)
• Gujarati (India)
• Haitian Creole (Haiti)
• Hebrew (Israel)
• Hungarian (Hungary)
• Icelandic (Iceland)
• Javanese (Java)
• Kannada (India)
• Konkani (India)
• Lao (Laos)
• Latin (Vatican City)
• Latvian (Latvia)
• Lithuanian (Lithuania)
• Luxembourgish (Luxembourg)
• Macedonian (North Macedonia)
• Maithili (India)
• Malagasy (Madagascar)
• Malay (Malaysia)
• Malayalam (India)
• Mongolian (Mongolia)
• Nepali (Nepal)
• Norwegian Bokmal (Norway)
• Norwegian Nynorsk (Norway)
• Odia (India)
• Pashto (Afghanistan)
• Persian (Iran)
• Portuguese (Portugal)
• Punjabi (India)
• Serbian (Serbia)
• Sindhi (India)
• Sinhala (Sri Lanka)
• Slovak (Slovakia)
• Slovenian (Slovenia)
• Spanish (Latin America)
• Spanish (Mexico)
• Swahili (Kenya)
• Swedish (Sweden)
• Urdu (Pakistan)

​

Speakers

• speakers: Optional. Supply exactly 2 items. Each item is an object.
• speakers[].voice: Required. Select a voice for this speaker.

Supported voice values

• Achernar
• Achird
• Algenib
• Algieba
• Alnilam
• Aoede
• Autonoe
• Callirrhoe
• Charon
• Despina
• Enceladus
• Erinome
• Fenrir
• Gacrux
• Iapetus
• Kore
• Laomedeia
• Leda
• Orus
• Pulcherrima
• Puck
• Rasalgethi
• Sadachbia
• Sadaltager
• Schedar
• Sulafat
• Umbriel
• Vindemiatrix
• Zephyr
• Zubenelgenubi

• speakers[].speaker_id: Required. String. Use only letters, digits, and underscores.

​

Temperature

• temperature: Optional. Control speech-generation variability. Number from 0 to 2. Default: 1.

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Output Files

• Read every item in the returned files array.
• Generated audio uses file_type: "audio".
• Read the audio URL from files[].file_url.