Dia2-2B — Next-Gen Open Source Text to Speech by Nari Labs
Dia2-2B is a 2 billion parameter open source TTS model from Nari Labs — the successor to Dia 1.6B with superior voice quality, richer emotion, and streaming dialogue. Already 11,000+ downloads on Hugging Face. Interested in AI TTS? Try our AI Voice Generator and AI Voice Cloning for free.
Dia2-2B Model Specifications
What Makes Dia2-2B Stand Out
2 Billion Parameters — More Power, Better Voice Quality
Dia2-2B packs 2 billion parameters compared to 1.6B in the original Dia model. The larger architecture captures finer vocal nuances, smoother prosody, and more natural-sounding intonation for English speech.
Emotion-Aware Speech Synthesis
Dia2-2B understands context and automatically adjusts emotional delivery — happiness, sadness, excitement, calm, and surprise all flow naturally without manual tuning. The model was trained specifically for expressive dialogue generation.
Built for Real-Time Performance
Dia2-2B features CUDA graph support and optimized inference pipelines. With bfloat16 precision and streaming output, it delivers low-latency audio generation ideal for production workflows.
Streaming Dialogue — Real-Time Generation
Dia2-2B doesn't need the entire text upfront — it starts generating audio from just the first few words. Perfect for real-time conversational AI, live assistants, and interactive applications.
Fully Open Source — Run Anywhere
Dia2-2B is released as open source on Hugging Face. Run it locally, deploy on your own servers, or use it through Dia TTS — the choice is yours. No vendor lock-in, full transparency.
Battle-Tested — 11,000+ Downloads
With over 11,000 downloads and 157 likes on Hugging Face, Dia2-2B is already trusted by thousands of developers, researchers, and creators worldwide.