Cartesia and TrueFoundry AI Gateway: Native Passthrough for Voice Inference

TrueFoundry’s AI Gateway integrates Cartesia’s voice models, Sonic-3.5 for text-to-speech and Ink-2 for speech recognition, through native passthrough without protocol translation. The gateway preserves full feature access while handling authentication, cost tracking, and observability, adding roughly 3-4 ms of latency while processing 350+ requests per second on a single vCPU.