C1 by Thesys

Product Introduction

1. C1 by Thesys is a Generative UI API middleware that transforms large language model (LLM) responses into interactive, real-time user interfaces such as charts, forms, cards, and tables. It acts as an OpenAI-compatible endpoint, integrating with any LLM, framework, or model control plane (MCP) in two lines of code to dynamically render structured UI components instead of static text.
2. The core value of C1 lies in its ability to reduce frontend development overhead by 80% while accelerating the deployment of AI-powered applications by 10x. It enables developers to deliver context-aware, adaptive interfaces that improve user engagement by replacing text-heavy outputs with interactive elements tailored to specific user queries and scenarios.

Main Features

1. C1 generates real-time adaptive UIs by converting LLM outputs into structured components like charts, forms, and tables using its React SDK, which renders responses directly into live interfaces. This eliminates manual UI coding for dynamic AI interactions.
2. The API integrates seamlessly with existing AI stacks via an OpenAI-compatible endpoint, supporting all major LLMs (e.g., OpenAI, Anthropic) and frameworks with minimal code changes. Developers only need to modify the API URL and SDK integration to start using C1.
3. Customizable UI components and tool-call support allow developers to embed proprietary React components, define custom styling, and connect to external data sources (APIs, databases) for real-time data rendering. Actions and workflows can be configured to trigger backend processes based on user interactions.

Problems Solved

1. C1 addresses the inefficiency of static UIs in AI applications, where traditional text-based LLM responses fail to engage users or adapt to evolving use cases. It replaces rigid interfaces with dynamic components that update in real time based on model outputs.
2. The product targets developers and product teams building AI-native tools like copilots, analytics dashboards, or customer-facing agents, where rapid iteration and contextual UI rendering are critical.
3. Typical use cases include generating interactive data visualizations for analytics platforms, creating dynamic forms for user input collection, and powering AI assistants that respond with task-specific interfaces like travel itineraries or financial dashboards.

Unique Advantages

1. Unlike design-focused tools like Lovable or Bolt, which generate static mockups or code snippets, C1 produces live, runtime UIs that adapt to user inputs and LLM outputs in real time. This enables true dynamic interaction without predefining every UI state.
2. The API’s compatibility with multiple LLMs and frameworks, combined with its React SDK, allows developers to retain full control over styling, logic, and data integration while eliminating boilerplate UI code.
3. Enterprise-grade security (GDPR, SOC2, ISO27001 compliance), zero data retention policies, and support for private deployments give C1 a competitive edge in regulated industries, where data privacy and scalability are non-negotiable.

Frequently Asked Questions (FAQ)

1. What is C1 by Thesys? C1 is an API layer that converts LLM text responses into interactive UI components like charts and forms in real time. It uses a React SDK to render structured outputs, supports multiple LLMs, and integrates with existing AI stacks via an OpenAI-compatible endpoint.
2. Who is Generative UI for? It is designed for developers building AI-native applications such as copilots, analytics tools, or customer-facing agents, where dynamic interfaces must adapt to user queries and LLM outputs without manual coding.
3. How does C1 differ from tools like Lovable or Bolt? C1 generates live, runtime UIs during application execution, whereas tools like Lovable or Bolt focus on pre-production mockups or code generation. C1’s outputs are context-aware and update dynamically based on real-time data and user interactions.