ChatTTS is an innovative text-to-speech (TTS) model designed for dialogue-based applications, such as large language model (LLM) assistants. It delivers natural and expressive speech, improving the overall conversational experience. The model outperforms many open-source TTS systems by offering high-fidelity voices with better intonation, making interactions more engaging and lifelike. Designed for developers, educators, and tech enthusiasts, ChatTTS supports multiple languages including English and Chinese, and it is ideal for software applications that require advanced voice synthesis.