What is MOSS-TTS?
No dated launch filed yetApache-2.0
Summary
Apache-2.0 speech family from OpenMOSS. MOSS-TTS-v1.5 supports 31 languages, with separate models for realtime streaming and voice design.
- Category
- Voice models
- Open source
- Yes
- License
- Apache-2.0
- Models
- MOSS-TTS-v1.5, MOSS-TTS-Realtime
- Pricing
- The repository says models in the family are Apache-2.0.
- Links
- GitHub
OpenMOSS/MOSS-TTS is a family, not one checkpoint. The flagship sizes on the model table include an 8B MOSS-TTS-v1.5 and a 1.7B realtime model. v1.5's language note lists 31 languages, keeping the original 20 and adding Cantonese, Dutch, Finnish, Hindi, Macedonian, Malay, Romanian, Swahili, Tagalog, Thai, and Vietnamese.
Use it when long-form speech or a dedicated realtime checkpoint matters. The editorial ranking is in Best free AI voice models in 2026.
MOSS-TTS alternatives
| Tool | License | Pricing note |
|---|---|---|
MOSS-TTSThis pageApache-2.0 speech family from OpenMOSS. MOSS-TTS-v1.5 supports 31 languages, with separate models for realtime streaming and voice design. | Apache-2.0 | The repository says models in the family are Apache-2.0. |
Qwen3-TTSApache-2.0 speech models from the Qwen team, 0.6B and 1.7B, with voice clone, voice design, and 10 languages. | Apache-2.0 | Weights and code are Apache-2.0. No hosted price is quoted on the repository README we used. |
VoxCPMApache-2.0 tokenizer-free TTS from OpenBMB. VoxCPM2 is a 2B model with 30 languages, voice design, cloning, and 48 kHz output. | Apache-2.0 | Weights and code are Apache-2.0, including commercial use, per the repository. |
ChatterboxMIT-licensed TTS from Resemble AI. Chatterbox Multilingual V3 is a 500M model for 23 or more languages with zero-shot cloning. | MIT | The model card lists an MIT license. No API price is copied here. |
KokoroApache-2.0 TTS model with 82 million parameters. Version 1.0, published January 27, 2025, lists 8 languages and 54 voices. | Apache-2.0 | Apache-2.0 weights. The model card says API hosts were under $1 per million characters as of April 2025. Self-hosting has no license fee. |
Launches and updates
No dated launch has been filed for MOSS-TTS yet. The description above is from the project’s own pages.
Guides covering MOSS-TTS
Questions
What is MOSS-TTS?
MOSS-TTS is an open-source speech family from OpenMOSS and MOSI.AI. The README covers long-form speech, dialogue, voice design, sound effects, and realtime streaming. The license line says Apache-2.0.
How many languages does MOSS-TTS-v1.5 support?
The README says MOSS-TTS-v1.5 and the local-transformer v1.5 support 31 languages, adding 11 languages on top of the 20 in MOSS-TTS 1.0.