Open Source Models for Voice AI

Kyutai — Kyutai's open speech-to-text and text-to-speech models built on the Delayed Streams Modeling framework for streaming, low-latency speech.

LiveKit — Open source platform for building, testing, deploying, and scaling voice, video, and physical AI agents.

CosyVoice — Multi-lingual large voice generation model, providing inference, training and deployment full-stack ability.

Myshell — Instant voice cloning by MIT and MyShell. Audio foundation model.

Kyutai — Pocket TTS is a compact text-to-speech model small enough to run on a CPU — fast, lightweight, on-device voice generation.

Gradium — Build expressive, low latency voice AI with a unified API for text, speech, and cloning.