Kimi / Moonshot AI (月之暗面)
Moonshot AI’s long-context AI assistant, pioneering ultra-long document processing with a 2 million token context window.
Overview
Kimi made waves by being the first Chinese AI to offer a 2 million token context window, enabling it to process extremely long documents, entire codebases, and extensive research papers in a single conversation. It has become particularly popular among Chinese knowledge workers and researchers for its document analysis capabilities and thoughtful, detailed responses.
Key Features
- ✓ 2 million token context window (industry-leading in China)
- ✓ Excellent long document analysis and summarization
- ✓ Web search integration for current information
- ✓ File upload support for PDFs, code, and documents
👍 Pros
- • Massive context window ideal for document-heavy workflows
- • High-quality, detailed responses with nuanced reasoning
- • Strong file processing capabilities
- • Clean, fast interface
👎 Cons
- • Primarily Chinese-focused with limited English optimization
- • Smaller model ecosystem compared to Baidu or Alibaba
- • API access is more limited than competitors
My Take
Kimi is the tool I reach for when dealing with massive documents in Chinese. The 2M token context window is not just a spec sheet number; it genuinely changes how you work with long documents. For anyone doing cross-border business with extensive Chinese contracts or reports, Kimi’s document processing is unmatched in the Chinese AI space.
Quick Info
- Pricing:
- freemium
- Starting at:
- Free tier available, Plus at ¥59/month (~$8 USD)
- Added:
- Feb 2026
Use Cases
Frequently Asked Questions
How does Kimi’s context window compare to Gemini?
Both Kimi and Google Gemini offer million-token-plus context windows. Kimi’s 2M token window is among the largest available. The key difference is that Kimi is optimized for Chinese-language documents while Gemini excels in English. For Chinese document processing, Kimi generally provides better results.
Can I use Kimi outside of China?
Kimi can be accessed from outside China, though registration typically requires a Chinese phone number. The interface is primarily in Chinese. International users may experience slower performance. The API is available for developers who want to integrate Kimi’s capabilities into their own applications.