Kimi

Kimi is Moonshot AI’s long-context assistant, built for reading entire books and document sets, with strong Chinese and English research support.

Overview

Kimi, developed by Chinese startup Moonshot AI, became famous for its exceptionally long context window, which lets it read and reason over entire novels, lengthy reports, and large document collections in one session. Users upload PDFs, Word files, and web pages, then ask for summaries, comparisons, and detailed answers grounded in the material. Kimi also performs web search with cited sources, writes and analyzes code, and handles Chinese and English with near-native fluency, making it a favorite research companion for bilingual users. Long context is transformative for whole-document reasoning: Kimi can compare chapters, trace arguments across hundreds of pages, and summarize books without chunking. Its bilingual strength means research in Chinese and English can be combined seamlessly in one session. Generous free access has made it a default study companion across Chinese universities.

Key Features

• Very long context windows that process entire books and document sets at once
• File analysis across PDFs, Word documents, spreadsheets, and images
• Web search integration with sourced, up-to-date answers
• Bilingual Chinese-English fluency for cross-language research
• Code writing and analysis capabilities for technical users
• Free consumer access with generous daily usage allowances
• Mobile and web apps with synchronized conversation history

Pricing

Kimi is free for most consumer use, supported by optional paid tiers for higher usage limits and priority access to its most capable models. Enterprise and API access to Moonshot AI’s models is priced separately for developers. Optional paid tiers mainly raise limits and priority, keeping the assistant accessible to students.

Who Is It For

Kimi is for researchers, students, and professionals who work with long documents and bilingual materials, especially those in Chinese-speaking markets who want a free, capable assistant. Writers processing long manuscripts and analysts handling bulk reports are the heaviest beneficiaries.

FAQ

Is Kimi free to use?

Yes, Kimi is free for daily consumer use with generous limits; paid options exist for heavy usage and priority model access. Daily free usage is generous; power users can subscribe for higher limits and priority.

Does Kimi offer an API?

Yes, Moonshot AI offers an API for its models, allowing developers to build applications on Kimi’s long-context capabilities. Moonshot AI’s API brings long-context models to developers building document-heavy applications.

How does Kimi compare to alternatives?

Kimi’s long-context document handling rivals NotebookLM and Perplexity, with an edge in Chinese-language and free-tier generosity. Kimi competes with NotebookLM on document depth and with general chatbots on bilingual flexibility.