Edge0 Releases Audio8-TTS-Realistic, a 0.6B Voice Cloning TTS Model

Edge0 has released Audio8-TTS-Realistic, a 0.6B-parameter open-weight text-to-speech model for zero-shot voice cloning from one reference clip and transcript, supporting 23 languages under Apache 2.0. It uses a dual-autoregressive design on Qwen2.5 0.5B and a three-stage training pipeline whose final GRPO stage is guided by a learned realism critic. Edge0 reports 4.86% average error on CV3 across 9 languages, ahead of Qwen3-TTS-1.7B (7.73%) and VoxCPM2 (5.35%), though larger models like Higgs TTS 3 still lead and Thai WER is near 49%.