Thesys

Generative UI is here

Introducing C1

The GenUI API for building engaging AI products.

Generative UI makes conversations truly engaging.
It understands intent, senses context, respects choices.
With every interaction, the UI redesigns itself
so your users feel understood, not just responded to.

Join 400+ teams building GenUI experiences with Thesys

Without an engaging interface,
even the smartest AI agents fall flat.Building UI for AI is harder than it should be

Weak engagementUsers expect more than text only conversations.

Mediocre designHardcoded UI doesn’t adapt to user input or context.

Slow velocityManually developing User Interface for AI slows teams down.

Introducing C1 C1 uses GenUI to bring AI conversations to life - effortlessly.

Dynamic & engagingVisually rich UI powered with forms, charts, images and more.

Insanely fast executionGuide UI generation with system prompts.

Thinks like a designer
in real-timeC1 responds to user input and builds consistent and intuitive UI in real time.
No need to wait for the next design iteration.

SecureThesys never stores your data and adheres to industry security standards.

EffortlessIntegrate in minutes, with just two snippets of code.

UniversalC1 integrates seamlessly with any language, framework and MCP server.

Try ChatWe built an AI chatbot to demonstrate the Generative UI power of C1. Try it now.

Cast of Harry Potter

Celestial objects

Compare Different Diet Plans

Best workout routine

Best vacation destination

ResourcesEnhance your product with C1

AI-powered shopping experiencesE-commerce businesses can deliver personalized shopping experiences, 24/7 support, and seamless transactions. All driven by the GenUI capabilities of C1.

API PricingTime to level up.

Input

$3.50 /million tokens

Output

$18.00 /million tokens

180K context windowOpenAI compatible API