Open-Fiesta

An open-source, multi-model AI chat playground built with Next.js App Router. Switch between providers and models, compare outputs side-by-side, and utilize optional web search and image attachments for enhanced conversations.

✨ Features

• Multiple Providers: Gemini, OpenRouter (DeepSeek R1, Llama 3.3, Qwen, Mistral, Moonshot, Reka, Sarvam, and more)
• Selectable Model Catalog: Choose up to 5 models to run simultaneously
• Web Search Toggle: Enable web search on a per-message basis
• Image Attachment Support: Upload and analyze images (Gemini models)
• Clean UI: Keyboard submit, streaming-friendly API normalization, and intuitive interface

🛠 Tech Stack

• Next.js 14 (App Router, TypeScript)
• Tailwind CSS for styling
• API Routes for provider calls and response normalization

🚀 Quick Start

1. Install Dependencies

npm i

2. Configure Environment

Create .env.local with the API keys you plan to use:

# OpenRouter (recommended for most free models)
OPENROUTER_API_KEY=your_openrouter_key_here

# Gemini (for Gemini models and image input)
GOOGLE_GENERATIVE_AI_API_KEY=your_gemini_key_here

3. Run Development Server

npm run dev
# Open http://localhost:3000

🔑 Environment Variables

Variable	Description	Required For
OPENROUTER_API_KEY	API key from OpenRouter	OpenRouter models
GOOGLE_GENERATIVE_AI_API_KEY	API key from Google AI Studio	Gemini models

Note: You can also provide API keys at runtime through the UI's Settings panel.

📁 Project Structure

app/
├── api/
│   ├── openrouter/route.ts    # Normalizes responses across OpenRouter models
│   ├── gemini/route.ts        # Gemini API integration
│   └── gemini-pro/route.ts    # Gemini Pro API integration
components/                    # UI components (chat box, model selector, etc.)
lib/                          # Model catalog and client helpers

🧠 Notes on DeepSeek R1

Open-Fiesta post-processes DeepSeek R1 outputs to remove reasoning tags and convert Markdown to plain text for improved readability while preserving all content integrity.

📄 License

This project is licensed under the MIT License. See the LICENSE file for details.

🙏 Acknowledgements

• Model access provided via OpenRouter and Google AI

👨‍💻 Credits

Created by Kislay

• LinkedIn: linkedin.com/in/kislayy
• Twitter: @whyKislay

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Made with ❤️ for the open-source AI community