Text to Speech

Inworld Realtime TTS 2.0

Next-generation ultra-fast neural text-to-speech engine. Features natural-language emotional steering, non-verbal cues (laughter, sighs), and multilingual voice synthesis in under 1 second.

$0.005/run Popular New 75 runs
Inworld Realtime TTS 2.0
Generation time: 0s

Your result will appear here

Configure parameters and press Run, or press Ctrl - ↵ Enter.

Run the model to see raw JSON response

See It In Action

Explore real outputs from this model. Click any example to instantly load its parameters and view results.

Sample 1
#1

API Endpoint

POST https://lumozai.com/api/v4/run

Use this endpoint to run the model with your parameters. Authentication is required using your API key.

Sample Code (PHP cURL)

<?php
// API endpoint URL
$apiUrl = 'https://lumozai.com/api/v4/run';

// Your API key
$apiKey = 'YOUR_API_KEY';

// Model parameters
$params = [
    'model_id' => 'realtime-tts-2',
    'text' => 'Welcome to Lumoz AI studio. Experience ultra-fast, expressive voice synthesis with natural human emotion.',
    'voice_id' => 'Ashley',
    'language' => 'auto',
    'audio_format' => 'mp3',
    'speaking_rate' => 0,
    'sample_rate' => 48000,
];

// Initialize cURL session
$curl = curl_init();

// Set cURL options
curl_setopt_array($curl, [
    CURLOPT_URL => $apiUrl,
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_POSTFIELDS => $params,
    CURLOPT_HTTPHEADER => [
        'Accept: application/json',
        'Authorization: Bearer ' . $apiKey
    ]
]);

// Execute the request
$response = curl_exec($curl);
$httpCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);

// Check for errors
if (curl_errno($curl)) {
    echo 'cURL Error: ' . curl_error($curl);
} else {
    // Process the response
    $result = json_decode($response, true);
    
    if ($httpCode == 200 && isset($result['success']) && $result['success']) {
        // Handle successful response
        echo "Model output: ";
        print_r($result['data']['output']);
    } else {
        // Handle error response
        echo "Error: " . ($result['message'] ?? 'Unknown error');
    }
}

// Close cURL session
curl_close($curl);

Request Parameters

Parameter Type Required Description
model_id string Required The ID of the model to run (realtime-tts-2)
api_key string Required Your API key for authentication (sent via Bearer token in the Authorization header)
text string Required The text to convert to speech (up to 2,000 characters). Supports emotional steering tags like [say excitedly], [whisper], non-verbal cues [laugh], [sigh], and SSML pause breaks <break time="1s" />.
voice_id string Optional Preset voice persona or custom voice identifier.
language string Optional Language detection or explicit specification.
audio_format string Optional Output audio format.
speaking_rate number Optional Speaking speed multiplier. Set to 0 for natural default pace (1.0x).
sample_rate string Optional Audio sample rate in Hz.

Response Format

{
    "success": true,
    "data": {
        "output": "This is the text output from the model based on your input parameters."
    }
}

Model Pricing

Pay only for what you run. Charges are deducted directly from your account balance with zero recurring commitments.

Rate per generation
$ 0.005 / generation
$5.00 per 1,000 generations
Cost Estimator
1,000 generations
Estimated Total $5.00
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