MegaTTS 3
Lightweight 0.45B diffusion TTS for zero-shot voice cloning.
About
MegaTTS 3 is ByteDance's open text-to-speech model, released in March 2025 in collaboration with Zhejiang University. It is a diffusion transformer with only 0.45 billion parameters that clones voices from short audio samples and synthesizes natural multilingual speech, punching well above its size class.
Checkpoints are published as ByteDance/MegaTTS3 on Hugging Face. The release is research-oriented, so review the license and the project's safety notes around voice cloning before building products on it.
Specs
Context window
Pricing
Free quota
API access
Weights
Released
Benchmarks
Provider-reported unless a source says otherwise. Benchmarks are marketing-adjacent by nature — treat them as directional.
Use cases
Trust score — 6/10
Scored 6/10 (metrics tier, metrics-v1). Evidence: Verified via vendor site/docs/GitHub and reputable coverage, wave 107; Trending score 62/100 from researcher assessment.