Bilibili Tech

Aug 17, 2026 · Artificial Intelligence

IndexTTS 2.5 Enables Cross‑Language Voice Synthesis with Zero‑Sample Multilingual Support

IndexTTS 2.5 adds zero‑sample voice cloning for Chinese, English, Japanese, Spanish and Arabic, doubles inference speed, introduces flexible speech‑rate control, and improves emotion and timbre fidelity, with detailed benchmarks and a systematic multilingual modeling study supporting its design choices.