Qwen3 Omni 30b a3b Captioner

This documentation is valid for the following list of our models:

• alibaba/qwen3-omni-30b-a3b-captioner

Try in Playground

Model Overview

This model is an open-source model built on Qwen3-Omni that automatically generates rich, detailed descriptions of complex audio — including speech, music, ambient sounds, and effects — without prompts. It detects emotions, musical styles, instruments, and sensitive information, making it ideal for audio analysis, security auditing, intent recognition, and editing.

Create AI/ML API Key

How to make the first API call

1️ Required setup (don’t skip this) ▪ Create an account: Sign up on the AI/ML API website (if you don’t have one yet). ▪ Generate an API key: In your account dashboard, create an API key and make sure it’s enabled in the UI.

2️ Copy the code example At the bottom of this page, pick the snippet for your preferred programming language (Python / Node.js) and copy it into your project.

3️ Update the snippet for your use case ▪ Insert your API key: replace <YOUR_AIMLAPI_KEY> with your real AI/ML API key. ▪ Select a model: set the model field to the model you want to call. ▪ Provide input: fill in the request input field(s) shown in the example (for example, messages for chat/LLM models, or other inputs for image/video/audio models).

4️ (Optional) Tune the request Depending on the model type, you can add optional parameters to control the output (e.g., generation settings, quality, length, etc.). See the API schema below for the full list.

5️ Run your code Run the updated code in your development environment. Response time depends on the model and request size, but simple requests typically return quickly.

If you need a more detailed walkthrough for setting up your development environment and making a request step by step — feel free to use our Quickstart guide.

API Schema

post

Body

modelstring · enumRequiredPossible values:

max_tokensnumber · min: 1Optional

The maximum number of tokens that can be generated in the chat completion. This value can be used to control costs for text generated via API.

streambooleanOptional

If set to True, the model response data will be streamed to the client as it is generated using server-sent events.

Default: false

Responses

200Success

idstringRequired

A unique identifier for the chat completion.

Example: chatcmpl-CQ9FPg3osank0dx0k46Z53LTqtXMl

objectstring · enumRequired

The object type.

Example: chat.completionPossible values:

creatednumberRequired

The Unix timestamp (in seconds) of when the chat completion was created.

Example: 1762343744

modelstringRequired

The model used for the chat completion.

Example: alibaba-cloud/qwen3-omni-30b-a3b-captioner

post/v1/chat/completions

curl -L \
  --request POST \
  --url 'https://api.aimlapi.com/v1/chat/completions' \
  --header 'Authorization: Bearer <YOUR_AIMLAPI_KEY>' \
  --header 'Content-Type: application/json' \
  --data '{
    "model": "alibaba-cloud/qwen3-omni-30b-a3b-captioner",
    "messages": [
      {
        "role": "user",
        "content": "Hello"
      }
    ]
  }'

200Success

{
  "id": "chatcmpl-CQ9FPg3osank0dx0k46Z53LTqtXMl",
  "object": "chat.completion",
  "created": 1762343744,
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "content": "Hello! I'm just a program, so I don't have feelings, but I'm here and ready to help you. How can I assist you today?",
        "refusal": null,
        "annotations": null,
        "audio": null,
        "tool_calls": null
      },
      "finish_reason": "stop",
      "logprobs": null
    }
  ],
  "model": "alibaba-cloud/qwen3-omni-30b-a3b-captioner",
  "usage": {
    "prompt_tokens": 137,
    "completion_tokens": 914,
    "total_tokens": 1051,
    "completion_tokens_details": null,
    "prompt_tokens_details": null
  },
  "meta": {
    "usage": {
      "credits_used": 120000,
      "usd_spent": 0.06
    }
  }
}

Code Example

Python

import requests
import json  # for getting a structured output with indentation 

response = requests.post(
    "https://api.aimlapi.com/v1/chat/completions",
    headers={
        # Insert your AIML API Key instead of <YOUR_AIMLAPI_KEY>:
        "Authorization":"Bearer <YOUR_AIMLAPI_KEY>",
        "Content-Type":"application/json"
    },
    json={
      "model": "alibaba/qwen3-omni-30b-a3b-captioner",
      "messages": [
        {
          "role": "user",
          "content": [
            {
              "type": "input_audio",
              "input_audio": {
                "data": "https://cdn.aimlapi.com/eagle/files/elephant/cJUTeeCmpoqIV1Q3WWDAL_vibevoice-output-7b98283fd3974f48ba90e91d2ee1f971.mp3"
              }
            }
          ]
        }
      ]
    }
)

data = response.json()
print(json.dumps(data, indent=2, ensure_ascii=False))

JavaScript

async function main() {
  const response = await fetch('https://api.aimlapi.com/v1/chat/completions', {
    method: 'POST',
    headers: {
      // insert your AIML API Key instead of <YOUR_AIMLAPI_KEY>
      'Authorization': 'Bearer <YOUR_AIMLAPI_KEY>',
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      model: 'alibaba/qwen3-max-instruct',
      messages:[
        {
          role: 'user',
          content: [
            {
              type: 'input_audio',
              input_audio: {
                data: 'https://cdn.aimlapi.com/eagle/files/elephant/cJUTeeCmpoqIV1Q3WWDAL_vibevoice-output-7b98283fd3974f48ba90e91d2ee1f971.mp3'
              }
            }
          ]
        }
      ],
    }),
  });

  const data = await response.json();
  console.log(JSON.stringify(data, null, 2));
}

main();

Response

{
  "id": "chatcmpl-bec5dc33-8f63-96b9-89a4-00aecfce7af8",
  "system_fingerprint": null,
  "object": "chat.completion",
  "choices": [
    {
      "index": 0,
      "finish_reason": "stop",
      "logprobs": null,
      "message": {
        "role": "assistant",
        "content": "Hello! How can I help you today?"
      }
    }
  ],
  "created": 1758898624,
  "model": "qwen3-max",
  "usage": {
    "prompt_tokens": 23,
    "completion_tokens": 113,
    "total_tokens": 136
  }
}