Kimi

Kimi is an AI assistant created by Moonshot AI, a Chinese AI research lab, designed specifically to handle extremely long conversations and enormous input sizes. Unlike most chatbots that struggle with documents longer than a few pages, Kimi can digest entire books, thousand-page PDFs, large codebases and research databases in a single turn, then reason across that entire context. Its K-series models excel at research tasks, real-time web browsing, and complex coding work, and it has become the go-to free alternative for users in Asia who need an assistant capable of sustained, deep analysis.

Highlights

• Handles documents of exceptional length—books, long PDFs, and large codebases in one conversation
• K-series models optimized for research, web search and coding tasks
• Maintains context across long discussions without losing accuracy
• Works across multiple languages and specialized domains
• Free tier accessible in China and other Asian markets

Kimi appeals to researchers, engineers and knowledge workers who routinely work with large documents and need to reason across expansive context. It's free to use in its primary markets with optional paid tiers for additional features. For anyone drowning in lengthy PDFs, code repositories or academic papers, Kimi's design philosophy—maximum context at minimum friction—is a genuine advantage.