C1 by Thesys is a Generative UI API that augments LLMs to respond with interactive UI like charts, forms, cards, and more in real-time, instead of plain text. It integrates seamlessly with any LLM, framework, or MCP in just 2 lines of code. Ship rich, interactive AI apps 10x faster with 80% less UI overhead.
This is the 5th launch from Thesys. View more
OpenUI
Launched this week
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 .
Free
Launch Team / Built With
@pgd @zahle_khan interesting launch.
Looking at how C1 sits between the LLM response and the rendered interface, it feels less like a UI toolkit and more like a middleware layer translating model output into interactive UI.
Especially when the system can transform responses into forms, charts and cards in real time.
Curious how you think about this internally.
Is OpenUI evolving mainly as a UI standard, or closer to an interface runtime layer for LLM-powered applications?
Thesys
@orateur Hey Ossy, what do you mean by ACC testing?
Copus
An open standard for generative UI is exactly what the ecosystem needs. Having 10K+ developers already using this through Thesys gives it real momentum. Congrats on the launch!
Thesys
@handuo thanks for the support!
Kiara Translation
great idea!
Thesys
@ishiid thank you. excited to see what you build.
Kiara Translation
@zahle_khan wow - I will prepare it to show you
One good update, here! Congrats on the launch, @pgd!
Thesys
@pgd @neilverma thanks for the support
Trangram
creative domain name