Hertz-Dev and Fish Agent v0.1 are two new open-source models that enhance capabilities in conversational AI and voice cloning. Hertz-Dev, developed by Standard Intelligence, is an 8.5 billion parameter transformer model designed for real-time conversational audio, achieving a theoretical latency of 80 milliseconds and a real-world latency of 120 milliseconds on a single NVIDIA RTX 4090. It is trained on 20 million hours of high-quality audio data but is presented as a base model without fine-tuning or reinforcement learning. In parallel, Fish Agent v0.1, released by Fish Audio, features a compact architecture with 3 billion parameters and supports zero-shot voice cloning. It is trained on 700,000 hours of multilingual audio, allowing for text and audio input with ultra-fast 200 milliseconds time-to-first-audio. Both models represent significant advancements in their respective fields, with Hertz-Dev focusing on conversational AI and Fish Agent v0.1 targeting multilingual voice synthesis.