Make AI apps respond with interactive UI in real-time
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.
C1 abstracts generative UI infrastructure, allowing teams to focus on product logic rather than building custom UI generation pipelines. Pre-built component types (dashboards, forms, charts) and style customizations accelerate time-to-market for AI-native applications.
C1 Reports API allows AI apps to create multi-page slides and reports as artifacts. Users get 100 pages free monthly, then pay $0.01 per page operation, enabling document generation without consuming LLM tokens.
C1 Generative UI API enables teams to create dashboards, forms, charts, slides, and reports programmatically. The API consumes calls and LLM tokens to generate structured UI components, allowing AI products to respond with rich visual interfaces instead of plain text.
C1 integrates with Anthropic Claude, OpenAI GPT, and Google Gemini models. Users pay provider rates directly with no markup, and can bring their own LLM keys on enterprise plans, avoiding proprietary pricing layers.
Thesys provides tiered plans (Free to Scale) with increasing API call limits, priority support, and enterprise features like SSO/SAML and self-hosting options. Teams can start free and upgrade as usage grows, with transparent per-call pricing after tier limits.