OpenUI – A code-like rendering spec for Generative UI

Show HN: OpenUI – A code-like rendering spec for Generative UI

Based, OpenUI – A code-like rendering spec for Generative UI works in show hn launch.

Profile

Thesys just open-sourced their generative UI rendering engine. Interesting timing given where Google a2ui and Vercel's json-render are headed. The difference worth noting: a2ui and json-render both treat JSONL as the contract between the LLM and the renderer. Thesys is betting that's the wrong primitive. Their engine uses a code-like syntax (OpenUI Lang) instead — LLM writes it, renderer executes it. The argument is that LLMs are fundamentally better at generating code than generating structured data, so you get cleaner output and ~67% fewer tokens. The broader vision seems to be a model-agnostic, design-system-agnostic layer that sits between any LLM and your actual UI components. You bring

Its activity falls under show hn launch; the profile below is assembled from public directory data.

It is recorded at the Show HN launch stage.

Website: www.openui.com