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Available now on ModelsLab · Voice & Audio

Inworld Text To SpeechHuman voices. Real time.

Try Inworld Text To SpeechAPI Documentation

Sample output

Enterprise TTS. Radically Affordable.

Instant Cloning

Clone Any Voice in Minutes

Create custom voices from just 5-15 seconds of audio, ready to use immediately.

Lightning-Fast

Sub-200ms Real-Time Latency

Max model delivers <200ms P50 latency; Mini hits ~120ms for ultra-responsive conversations.

Multilingual Support

15 Languages, One API

Synthesize expressive speech across 15 languages with context-aware emotion and non-verbal controls.

Examples

See what Inworld Text To Speech can create

Copy any prompt below and try it yourself in the playground.

Customer Support Agent

“Create a professional customer support voice agent with warm, empathetic tone. Clone a company representative's voice using 10 seconds of training audio. Synthesize responses with natural pauses and professional delivery for live customer interactions.”

Interactive AI Tutor

“Generate an engaging educational voice for an AI coding tutor. Use instant voice cloning to personalize the instructor's voice. Synthesize explanations with varied pacing and emphasis on technical concepts for better comprehension.”

Multilingual Voiceover

“Produce high-quality voiceovers for a product demo video in English, Spanish, and French. Use the same cloned voice identity across all languages. Maintain consistent tone and expressiveness for professional brand presentation.”

Real-Time Voice Agent

“Build an interactive voice assistant with sub-200ms response latency. Clone a branded voice personality from company audio samples. Enable turn-taking conversations with natural speech patterns and emotional expressiveness.”

For Developers

A few lines of code.
Clone voices. Three lines.

ModelsLab handles the infrastructure: fast inference, auto-scaling, and a developer-friendly API. No GPU management needed.

  • Serverless: scales to zero, scales to millions
  • Pay per second, no minimums
  • Python and JavaScript SDKs, plus REST API
API Documentation 
import requests


response = requests.post(
    "https://modelslab.com/api/v7/voice/text-to-speech",
    json={
  "key": "YOUR_API_KEY",
  "prompt": "Hey, love. I just wanted to say… you're doing beautifully. Even if today felt a little messy, even if you didn’t get everything done  that’s okay. You’re still growing, still trying, still shining. I see your heart, your effort, your gentleness. And I just hope you can feel how much you're loved. So rest easy now. You’re safe, you’re enough, and I’m proud of you  more than words can say.",
  "voice_id": "Alex"
}
)
print(response.json())

FAQ

Common questions about Inworld Text To Speech

Read the docs

Inworld TTS is a high-quality, low-latency text-to-speech API that converts text into human-like speech with sub-200ms latency. Instant voice cloning lets you create custom voices from just 5-15 seconds of audio using zero-shot learning, ready to use in minutes.

Inworld TTS 1.5 Max delivers <200ms P50 latency, while the Mini model achieves ~120ms for ultra-fast synthesis. Both support streaming for real-time conversational experiences that feel natural and responsive.

Yes, Inworld TTS supports 15 languages with the same quality and latency performance. Voices work best when synthesizing text in the same language as the training audio, and you can clone voices across any supported language.

For best results, use audio recorded at 22 kHz sample rate with 16-bit depth. Instant voice cloning requires 5-15 seconds of audio; professional cloning uses 30+ minutes for higher fidelity. Vary emotion and delivery across clips for better voice quality.

Yes, Inworld offers free instant voice cloning through the Portal for all users. API access and professional voice cloning options are available with flexible pricing designed to be radically affordable compared to competitors.

Inworld ranks #1 on industry TTS leaderboards like Hugging Face TTS Arena with superior voice quality and 40% lower word error rates. It combines instant voice cloning, sub-200ms latency, multilingual support, and 30% greater expressiveness at a fraction of competitor costs.

Ready to create?

Start generating with Inworld Text To Speech on ModelsLab.

Try Inworld Text To SpeechAPI Documentation