Production-Ready AI Chat Template

Build your own multi-model AI chat app with 120+ models, authentication, streaming, and advanced features.

Next.js 15 • Vercel AI SDK • Shadcn/UI • Better Auth • Drizzle ORM

Live Demo

Ship a full-featured AI chat in minutes with Claude, GPT-4, Gemini, Grok, and 120+ models through Vercel AI Gateway.

• Next.js 15 - App Router, React Server Components
• TypeScript - Full type safety
• Vercel AI SDK v5 - Unified AI provider integration with 120+ models
• Better Auth - Authentication & authorization
• Drizzle ORM - Type-safe database queries
• PostgreSQL - Primary database
• Redis - Caching & resumable streams
• Vercel Blob - Blob storage
• Shadcn/UI - Beautiful, accessible components
• Tailwind CSS 4 - Styling
• tRPC - End-to-end type-safe APIs
• Zod 4 - Schema validation
• Zustand - State management
• Motion - Animations
• t3-env - Environment variables
• Pino - Structured Logging
• Langfuse - LLM observability & analytics
• Vercel Analytics - Web analytics
• Biome - Code linting and formatting
• Ultracite - Biome preset for humans and AI
• Streamdown - Markdown for AI streaming
• AI Elements - AI-native Components
• AI SDK Tools - Developer tools for AI SDK

• 🤖 120+ AI Models - Claude, GPT-5, Gemini, Grok via Vercel AI Gateway
• 🔐 Auth & Sync - Secure authentication with cross-device chat history
• 🎯 Try Without Signup - Guest access for instant demos
• 📎 Attachments - Images, PDFs, documents in conversations
• 🎨 Image Generation - AI-powered image creation and editing
• 💻 Syntax Highlighting - Code formatting for all languages
• 🔄 Resumable Streams - Continue after interruptions
• 🌳 Chat Branching - Alternative conversation paths
• 🔗 Chat Sharing - Share conversations with others
• 🔭 Deep Research - Real-time web search with citations
• ⚡ Code Execution - Secure Python/JavaScript sandboxes
• 📄 Document Creation - Generate docs, spreadsheets, presentations

1. Clone and Install

   git clone https://github.com/franciscomoretti/sparka.git
   cd sparka
   bun install

2. Environment Setup

   cp .env.example .env.local

   Required:

   • POSTGRES_URL - Database connection
   • AI_GATEWAY_API_KEY - Vercel AI Gateway
   • BLOB_READ_WRITE_TOKEN - Vercel Blob read/write token
   • CRON_SECRET - Cron job authentication
   • AUTH_SECRET - Better Auth secret
   • AUTH_GOOGLE_ID / AUTH_GOOGLE_SECRET - Google OAuth
   • AUTH_GITHUB_ID / AUTH_GITHUB_SECRET - GitHub OAuth

   Optional:

   • REDIS_URL - For resumable streams
   • OPENAI_API_KEY - Direct OpenAI access
   • TAVILY_API_KEY - Web search
   • EXA_API_KEY - Web search
   • FIRECRAWL_API_KEY - Web scraping
   • SANDBOX_TEMPLATE_ID - Code execution

3. Database Setup

   bun run db:migrate

4. Development Server

   bun dev

Visit http://localhost:3000 to start building.