Meta AI has introduced the Seamless Communication models, a family of AI research models that enable more natural and authentic communication across languages. The models include SeamlessExpressive, SeamlessStreaming, and SeamlessM4T v2, which aim to preserve expression and intricacies of speech, deliver near real-time translation, and serve as a foundational model for universal translation. The models have been designed to break down communication barriers and promote a safe and responsible AI ecosystem. The full suite of Seamless Communication models, along with metadata, data, and tools, will be publicly released to enable fellow researchers to build upon this work.