Kimi

Kimi is the assistant from Moonshot AI, and its most-cited capability is handling very long inputs — entire books, lengthy reports or large document sets in a single conversation.

That makes it well suited to research and document analysis in Chinese, where the task is reading a large body of material and answering questions across it rather than generating from a short prompt.

As with all such tools, answers drawn from a long document should be checked against the source, since attribution over very long contexts is where models most often slip.