Cartesia's models are built on State Space Models (SSMs) — specifically Mamba and H-Net architectures pioneered by Cartesia's research team — which deliver ultra-low latency, long-context reasoning, and high efficiency at scale. The platform exposes models via a cloud API with regional endpoints, and also supports on-premise VPC deployment and on-device edge inference across mobile, PC, and robotics environments. Sonic (TTS) and Ink (STT) power the Line voice agent platform, which integrates with existing enterprise systems via robust SDKs. All inference runs in-region to satisfy data residency and compliance requirements.