The Open Standard for Generative UIMake your AI apps respond with interactive UI components like cards, tables, forms and charts instead of text. Streaming-native, token-efficient, and works with any AI model (GPT,Claude,M2.5) and agent framework like ai-sdk, Google ADK
Hey Product Hunt! 👋
Parikshit here, co-founder of https://thesys.dev
Introducing OpenUI - the open standard for generative UI
Why we built this:
Over the past two years, Thesys has powered generative UI for 10,000+ developers through our managed platform, C1.
At that scale, we kept hitting the same wall. JSON : the standard format everyone (including us) used for structured UI output, kept breaking in production.
It's too verbose, so rendering felt slow. It's too rigid, so custom design systems fought against it. And LLMs kept producing malformed output because deeply nested JSON isn't what they were trained to generate. We tried better validation, better prompts. The error rates improved. The problems didn't go away.
So we designed a new format. OpenUI Lang uses code-like syntax that mirrors how LLMs actually learned structure, from billions of lines of code.
The results:
🌱 67% fewer tokens than json-render → faster responses, lower cost
⚡️ 3x faster rendering → compared to our previous JSON-based approach
🎯 Near 0% malformed output → LLMs produce valid OpenUI Lang the way they produce valid functions
🦾 Model-agnostic → Works with all LLMs including OpenAI, Anthropic, Gemini, Mistral, Ollama
📦 Framework-agnostic → Works with your favorite frameworks including Vercel AI SDK, LangChain, CrewAI
📱UI library agnostic → Hook your own design system or the popular ones like ShadCN, Radix and so on.
Get started:
📖 Docs → openui.com/docs
🎮 GitHub → github.com/thesysdev/openui
💬 Discord → https://discord.com/invite/Pbv5P...
We're open-sourcing this because we believe generative UI should be shared infrastructure, not locked behind any one platform.
If you're building AI interfaces or thinking about it,we'd love you to try it, break it, and tell us what's missing.
Know more about Thesys : Https://thesys.dev
About OpenUI on Product Hunt
“The open standard for Generative UI”
OpenUI launched on Product Hunt on March 11th, 2026 and earned 340 upvotes and 26 comments, placing #4 on the daily leaderboard. The Open Standard for Generative UIMake your AI apps respond with interactive UI components like cards, tables, forms and charts instead of text. Streaming-native, token-efficient, and works with any AI model (GPT,Claude,M2.5) and agent framework like ai-sdk, Google ADK
On the analytics side, OpenUI competes within Open Source, Developer Tools, Artificial Intelligence and GitHub — topics that collectively have 1.1M followers on Product Hunt. The dashboard above tracks how OpenUI performed against the three products that launched closest to it on the same day.
Who hunted OpenUI?
OpenUI was hunted by Parikshit Deshmukh. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Parikshit Deshmukh