Kimi

Kimi is an AI assistant made by Moonshot AI, a company based in Beijing. It launched in October 2023. Early versions became known for reading very long documents in one go, which made it popular for summarizing reports and papers.

Kimi answers questions, searches the web, reads files and helps with code. It runs on Moonshot's own Kimi models. In 2025 the company released Kimi K2 with open weights, and it drew wide attention from developers outside China. A research mode writes longer reports with sources. Kimi also offers a slide maker and an agent mode that carries out longer tasks such as building web pages. The app is available on the web, on desktop and on iOS and Android.

The basic assistant is free. Paid plans give more usage of stronger models and agent features. Developers can use Kimi models through the Moonshot API or run the open models themselves. Moonshot AI was founded in 2023 by Yang Zhilin and other researchers.