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On November 11, Zyphra released ZONOS3-Mini, an open-source text-to-speech model for zero-shot voice cloning and fine-grained vocal control across 43 languages. It uses a sparse mixture-of-experts backbone with 100M active and 800M total parameters. Zyphra reports under 570 ms time-to-first-audio in-browser on a Pixel 9 and under 150 ms on an M3 MacBook Air. It reports 80 ms median on a single H100. Weights are on Hugging Face under Apache 2.0, with MIT-licensed runtimes for SGLang-Omni, Apple MLX, C++/ggml, and in-browser WebGPU. That makes it worth a look for voice agents that need fast or local speech. Source: Zyphra on Hugging Face.
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