Descriptions:
Corbin builds a real-time conversational AI companion using InWorld’s TTS model 1.5, walking through the full development process inside Cursor with TypeScript. The video leads with the model’s two headline specs: sub-250 millisecond response latency — faster than typical human conversational response times — and a cost of $0.005 to $0.01 per minute, which Corbin describes as approximately 25x cheaper than comparable voice AI services currently on the market.
The build starts with InWorld’s playground, where Corbin browses available voice profiles before selecting “Olivia” for the companion persona. He then copies InWorld’s LLM-ready API documentation directly into Cursor to bootstrap the TypeScript app, using the AI to handle dependency installation, environment file configuration, and iterative debugging when npm errors surface. The tutorial covers API key generation with full permissions, voice ID selection, and how to swap or A/B test different voice profiles — useful for developers evaluating male vs. female voices or accent variations for their use case.
InWorld’s model supports text, speech, and image as inputs, and the video highlights several applicable verticals: AI companions, customer support agents, healthcare intake workflows, and fitness coaching. The video is sponsored by InWorld.
📺 Source: corbin · Published January 28, 2026
🏷️ Format: Hands On Build
