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 4th launch from Thesys. View more
Agent Builder by Thesys
Launched this week
Build AI agents that reason dynamically and respond with charts, cards, forms, slides and reports. No workflows. No code. Just connect your data, add instructions, customize style, and publish and share with anyone or embed on your site.
Free Options
Launch Team
This is interesting. Generative UI instead of static text feels like the natural next step for LLM-based apps.
Thesys
@oleh_ilikchiiev thanks for the supprot!
PROCESIO
Congratulations
Thesys
@madalina_barbu Thanks! Would love for you to try it out.
Avatars by Studio Neiro AI
Congrats on the launch!!
Thesys
@maria_polesh thanks for the support
Warp
Thesys
@ericdachen thanks for the support!
BeFreed
Great product!
Normain
Congrats on the launch!
You mention C1 handles UI generation and runtime under the hood that’s super interesting.
From a builder perspective, I’m curious:
is the rendering primarily client-side, server-driven, or hybrid?
And when generating something like a multi-series chart during a live conversation, how do you keep the experience responsive?
Really excited about the idea of LLMs returning structured, interactive UI instead of just text.