What is LumenAI?
LumenAI is an AI chat app for serious research. It lets you upload a library of PDFs, research papers, or textbooks and then chat with them in a natural way. You can ask questions across multiple threads, keep chat history and context, and work without usage quotas. It supports large document libraries, multiple workspaces, model choice per turn, and formatting for code and LaTeX. It also uses a BYOK setup, so you bring your own API key and only pay for what you use. The product is aimed at researchers, students, and knowledge workers who want a more flexible alternative to NotebookLM or Claude Projects.
Key features
- Upload many PDFs with no file size limits.
- Chat across multiple threads with full context.
- Use your own API key and control costs.
- Search with hybrid vector and keyword retrieval.
- Switch between workspaces for projects or topics.
- Render code blocks and LaTeX beautifully.
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Phuong Lam Nguyen
