Beyond Components: Designing Generative UI for MCP Apps — Ruben Casas, Postman
Frontier models now generate high-fidelity UI, enabling a shift from static to generative UI for MCP apps.
“And now it can write better front-end code than me.”
Postman staff engineer Ruben Casas argues that the late-2025 release of models like GPT 5.2 and Opus 4.5 made high-fidelity, accessible UI generation fast and reliable, yet most apps remain stuck in a static UI paradigm. He frames generative UI for MCP apps as the next step toward dynamic, on-demand interfaces ('the Jarvis moment').