Building a Cost-Efficient Generative UI Architecture in React Native

The article presents a cost-efficient Generative UI architecture for the Fonyx React Native app that uses a metadata-over-data approach—instead of having the LLM generate full datasets, the model returns lightweight metadata (tool calls with parameters), and the client fetches and renders actual data. This three-layer separation of AI orchestration, data fetching, and native UI rendering dramatically reduces token costs, latency, and hallucination risks while keeping outputs deterministic and scalable.