Inworld’s Realtime TTS models offer ultra-realistic, context-aware speech synthesis, zero data retention, and precise voice cloning capabilities, enabling developers to build natural and engaging experiences with human-like speech quality at an accessible price point. Our models can be accessed via API (streaming and non-streaming) or the TTS Playground.Documentation Index
Fetch the complete documentation index at: https://docs.inworld.ai/llms.txt
Use this file to discover all available pages before exploring further.
Developer quickstart
Learn how to make your first API call with a guided tutorial.
TTS Playground
Try different TTS models and voice cloning in TTS Playground.
Code Examples
Browse ready-to-use GitHub samples for common use cases.
Models
Realtime TTS 1.5 Max
Our flagship model, delivering the best balance of quality and speed
- Rich, expressive, contextually aware speech
- Support for 15 languages
- Optimized for real-time use (<200ms median latency)
- High quality instant voice cloning
Realtime TTS 1.5 Mini
Our ultra-fast, most cost-efficient model. For when latency is the top priority.
- Ultra-low latency (~120ms median latency)
- Support for 15 languages
- Radically affordable pricing
- High quality instant voice cloning
Features
| Feature | Realtime TTS-1.5-Max | Realtime TTS-1.5-Mini |
|---|---|---|
| Radically accessible pricing | See pricing | See pricing |
| Quality | #1 ranked, maximum stability | #1 ranked |
| P50 Latency | 200 ms | 120 ms |
| Instant voice cloning | ||
| Professional voice cloning | ||
| Custom pronunciation | ||
| Multilingual | 15 languages | 15 languages |
| Pause controls | ||
| Timestamp alignment | ||
| On-premises deployments | ||
| Zero data retention |