A modern, feature-rich AI chat application built by interns, for interns. It's the second-best chat app in the world, after T3 chat. It's fast, has lots of features, and is open-source.
🔗 Live demo → https://intern3.chat
📚 Documentation → https://docs.intern3.chat
- Multi-model support with Gemini, OpenAI, Claude, and more.
- BYOK API key system: Native Provider BYOK → OpenRouter BYOK → In-house credits.
- In-house credits for select models (no API key required)
- Custom AI prompt configuration
- Web Search integration with Brave Search and Firecrawl
- Image Generation using fal.ai models and GPT-Image-1
- HTML/Mermaid/React artifacts preview
- Native Voice input in input box using Groq
- HTTP/SSE MCP Support for Model Context Protocol
- Supermemory API integration for persistent memories
- File Attachments - Upload code, text files, PDFs, and images
- Resumable streams for reliable message delivery
- Edit & Regenerate any message
- Copy messages with one click
- Thread management with sidebar navigation
- Folder organization for chat threads
- CMD+K search bar for quick chat navigation
- Beautiful, modern interface with multiple theming options
- Normal/Wide chat view options
- Responsive design for all devices
Simply visit https://intern3.chat and sign up for an account.
Follow our Vercel deployment guide to set up your own instance.
- [1]: Some models are available with in-house credits, so API keys aren't always required! But not all, so we don't go broke (looking at you,
o3,claude-sonnet-4andclaude-opus-4's of the world...) - [2]: You might have to add in the model IDs you would like to use yourself.