kimi-k2-0905-preview

Kimi K2 0905 Preview is a chat-oriented large language model from Moonshot positioned as part of the Kimi K2 family of text assistants. It is built to operate as a conversational engine with a strong emphasis on extended context, exposing a 256K token window that places it in the top tier among chat models for handling long documents and multi-turn interactions. The model is designed around practical assistant use cases, pairing standard chat behavior with native function calling and web search capabilities, so it can move fluidly between dialogue and tool-augmented task execution rather than acting as a pure text generator.

Within the Kimi K2 lineup, this 0905 preview sits alongside variants such as K2.5, K2.6, and the K2 thinking models, all of which share the same 256K context foundation that the platform highlights as a key advantage for long-horizon work. It is offered through routing gateways with input pricing near $0.60 per million tokens and output pricing around $2.50 per million tokens, placing it in the mid-range cost band and below many competing chat models. Its combination of a very long context window, function calling, and web search makes it a fit for code assistance, document-heavy analysis, and agent-style workflows where the model needs to pull in external information and tools, and it serves as a stable preview stepping stone toward the more agent-capable K2.6 release.