Lexon AI

Transparent answers backed by verifiable evidence

MadHacks 2025 Finalist

Live Demo · Devpost · Architecture · Design Decisions

Overview

Lexon AI is a source-grounded research interface that generates transparent answers, connects individual claims to supporting evidence, and visualizes the relationship between questions, answers, and sources through an interactive 3D evidence graph.

Most AI interfaces provide a response followed by a list of links. Lexon AI makes the evidence structure itself explorable. Users can inspect why a source supports a claim, compare evidence across answer blocks, and move between visual layouts designed for different research workflows.

Product Experience

Capability	What it enables
Source-grounded generation	Produces answers from retrieved web context rather than presenting unsupported output.
Claim-level evidence links	Connects individual answer blocks directly to the sources that support them.
Interactive 3D exploration	Supports rotation, zooming, inspection, filtering, and graph expansion.
Multiple layouts	Provides cluster, circular, globe, baseline, and Knowledge Deck views.
Expandable research paths	Extends selected sources into related concepts and research directions.
Evidence ranking	Preserves retrieval relevance information throughout the answer process.

How It Works

1. A user submits a research question.
2. Exa retrieves relevant web sources.
3. The answer service generates structured answer blocks from the retrieved context.
4. The graph builder connects the question, claims, sources, and supporting concepts.
5. The frontend renders the result as an interactive research interface.

See Architecture for the request flow and Design Decisions for the graph model, layout rationale, and demo behavior.

Project Structure

Lexon-AI/
├── backend/          Retrieval, answer generation, and graph construction
├── frontend/         React and Three.js research interface
├── docs/             Architecture and design rationale
├── readme_assets/    Project visuals
├── LICENSE
└── README.md

Local Development

Requirements

• Node.js 18 or newer
• npm
• Exa API credentials
• OpenAI API credentials

Installation

git clone https://github.com/Tejas7007/Lexon-AI.git
cd Lexon-AI
npm run install:all

Create backend/.env from the provided example and add your credentials. Create frontend/.env from frontend/.env.example and configure the backend URL.

Start the backend:

cd backend
npm run dev

Start the frontend in a second terminal:

cd frontend
npm run dev

Run the deterministic backend tests and both production builds:

cd backend
npm test
cd ..
npm run build

Team

Lexon AI was developed at MadHacks 2025 by:

• Tejas Dahiya
• Quinn Hasse
• Franco Pastor Cueto
• Ares Stavropoulos

License

Released under the MIT License.