Moonshot AI's chatbot that carved out a niche in processing absolutely massive documents. The context window is enormous - you can throw in a 200-page PDF, a full book, or a stack of research papers and it will actually remember and cross-reference everything without degrading. Not as well known in the West, but in Asia it's one of the most popular AI assistants. Particularly good for academic research, document analysis, and summarizing long-form content. The free tier has generous limits that cover most use cases. If you regularly work with long documents and are tired of other models forgetting what was on page 3, give Kimi a shot.