Inworld TTS-1.5: Upgrading the #1 Ranked TTS Model with Production-Grade Latency, Expression and Stability

https://inworld.ai/blog/introducing-inworld-tts-1-5

TTS-1.5 Max: P90 time to first audio under 250 ms, $25 per 1M characters (about $0.025 per minute). TTS-1.5 Mini: under 130 ms, $15 per 1M characters (about $0.015 per minute). 15 languages. Vendor figures.

Realtime speech-to-speech and expressive TTS for characters