Discontinued on Moonshot's API in favour of K3; the weights remain for anyone who wants to self-host.
Kenning's take
What it does
Kimi K2.5 built on Kimi K2 with further training on about 15 trillion mixed image and text tokens, so it can read images and video as well as text. It introduced Agent Swarm, which splits a job across up to 100 sub-agents, and ran in Instant, Thinking, Agent and Agent Swarm modes on Kimi.com and the Kimi app. Moonshot's API discontinued it on 31 August 2026 in favour of Kimi K3, though the weights stay on Hugging Face.
- Native image and video input
- Agent Swarm with up to 100 sub-agents
- Instant, Thinking, Agent and Agent Swarm modes
- Documents, spreadsheets and slides through chat
- Used with the Kimi Code terminal tool
Who it suits. Developers and power users who want an open multimodal model for coding and agent tasks.
Key facts
- Category
- AI models
- Part of
- Kimi
- Made by
- Moonshot AI
- Based in
- China
- Released
- 27 January 2026
- How to get it
- open weights on Hugging Face under a Modified MIT licence; discontinued on Moonshot's API on 31 August 2026
- Works on
- self-hosted, Hugging Face
- Free plan
- Weights free to download under the Modified MIT licence
Reviews and write-ups
- InfoQ 2026-02-17
FAQ
When was Kimi K2.5 released?
27 January 2026, according to press coverage of the launch.
Is Kimi K2.5 still on the Kimi API?
No. Moonshot discontinued it on 31 August 2026 and recommends Kimi K3.
Facts from the maker's own pages and the sources listed. Checked 2026-10-11.
Similar tools
Kimi K2
Moonshot AI's first trillion-parameter open-weight model, built for coding and tool use
Kimi K2 Thinking
Reasoning version of Kimi K2 that thinks step by step between hundreds of tool calls
Kimi K2.6
Open Moonshot AI model for long coding sessions and swarms of up to 300 sub-agents
Kimi K2.7 Code
Moonshot AI's open coding model, built on K2.6 and using about 30% fewer thinking tokens