ElevenLabs Text-to-Dialogue v3

Generate natural, expressive multi-speaker dialogue audio with ElevenLabs Eleven v3. Provide a sequence of dialogue turns, each with its own voice, and receive a single hosted audio file. Supports 70+ languages.

Models

Model Name	Description
`elevenlabs-text-to-dialogue-v3`	Multi-speaker dialogue generation with expressive delivery across 70+ languages

Pricing

Per-character pricing, based on the total character count of all dialogue[].text values:

Item	Value
Per character	see playground
Limits	up to 10 distinct voices, total text ≤ 5000 characters per request

Pre-charged on submit and automatically refunded if generation fails. Use POST /v1/estimate to preview the exact cost before submitting.

Create Task

curl -X POST https://api.aivideoapi.ai/v1/audio/generations \
  -H "Authorization: Bearer sk-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "elevenlabs-text-to-dialogue-v3",
    "callback_url": "https://your-server.com/webhook",
    "input": {
      "dialogue": [
        { "text": "Hey! Did you finish the report?", "voice": "21m00Tcm4TlvDq8ikWAM" },
        { "text": "Almost — just adding the final numbers now.", "voice": "AZnzlk1XvdvUeBnXmlld" }
      ],
      "stability": 0.5,
      "language_code": "auto"
    }
  }'

Request Body

Field	Type	Required	Description
`model`	string	Yes	`elevenlabs-text-to-dialogue-v3`
`input`	object	Yes	Generation parameters, see below
`callback_url`	string	No	URL to receive task completion/failure notifications

Input Object

Field	Type	Required	Description
`dialogue`	array	Yes	Ordered list of dialogue turns. Each item is `{ text, voice }`. Up to 10 distinct voices; total text across all turns ≤ 5000 characters
`dialogue[].text`	string	Yes	What this voice says
`dialogue[].voice`	string	Yes	ElevenLabs voice ID or preset name
`stability`	number	No	Voice stability / randomness. One of `0`, `0.5`, `1`. Default `0.5`
`language_code`	string	No	Language code (e.g. `auto`, `en`, `zh`, `ja`, `fr`). Default `auto` (auto-detect)

Response

{
  "code": 200,
  "msg": "success",
  "data": {
    "taskId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890"
  }
}

Estimate

Preview the credit cost without creating a task. The cost scales with the total character count of dialogue[].text.

curl -X POST https://api.aivideoapi.ai/v1/estimate \
  -H "Authorization: Bearer sk-your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "elevenlabs-text-to-dialogue-v3",
    "input": {
      "dialogue": [
        { "text": "Hello there!", "voice": "21m00Tcm4TlvDq8ikWAM" }
      ]
    }
  }'

Query Task

curl https://api.aivideoapi.ai/v1/tasks/{taskId} \
  -H "Authorization: Bearer sk-your-api-key"

Status transitions: pending -> processing -> completed or failed.

Completed

{
  "id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "status": "completed",
  "model": "elevenlabs-text-to-dialogue-v3",
  "created_at": 1775383908,
  "completed_at": 1775383956,
  "output": {
    "urls": [
      "https://file.aivideoapi.ai/audio/2026/06/23/dialogue.mp3"
    ],
    "metadata": {
      "model": "elevenlabs-text-to-dialogue-v3"
    }
  }
}

Audio URLs are valid for 24 hours.

Failed

{
  "id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "status": "failed",
  "model": "elevenlabs-text-to-dialogue-v3",
  "created_at": 1775383908,
  "error": {
    "code": "upstream_error",
    "message": "Generation failed"
  }
}

When a task fails, pre-charged credits are automatically refunded.

Callback

Pass callback_url when creating the task. The system will automatically send a POST request to your URL when the task completes or fails. The format matches the query task response.

Error Codes

When a request fails, the API returns a JSON error response:

{
  "error": {
    "code": "insufficient_credits",
    "message": "Your credit balance is too low. Please top up.",
    "type": "billing_error"
  }
}

Error Reference

HTTP Status	Code	Type	Description
400	`invalid_request`	invalid_request_error	Missing or invalid parameters
401	`invalid_api_key`	authentication_error	API key is invalid, disabled, or deleted
402	`insufficient_credits`	billing_error	Credit balance too low, please top up
403	`ip_not_allowed`	permission_error	Request IP not in the key's allowlist
404	`model_not_found`	invalid_request_error	Model does not exist or is inactive
404	`task_not_found`	invalid_request_error	Task ID does not exist
429	`rate_limit_exceeded`	rate_limit_error	Too many requests, please slow down
429	`spend_limit_exceeded`	billing_error	Key spend limit reached (hourly/daily/total)
500	`internal_error`	api_error	Unexpected server error
503	`upstream_error`	upstream_error	Upstream AI provider returned an error

Common Scenarios

invalid_request (400)

Returned when required fields are missing or invalid.

{
  "error": {
    "code": "invalid_request",
    "message": "'model' is required.",
    "type": "invalid_request_error"
  }
}

insufficient_credits (402)

Your balance is too low. Check your balance with GET /v1/credits and top up in Dashboard > Billing.

invalid_api_key (401)

Possible causes:

The key does not start with sk-
The key has been disabled or deleted
The user account has been banned

upstream_error (503)

The upstream AI provider returned an error. This may happen when:

The input contains sensitive or prohibited content
The provider is temporarily unavailable
The request parameters are not supported by the provider

Credits are automatically refunded when a task fails due to upstream errors.