# Kimi K3 @ michaelleung.info

> A sub-site of michaelleung.info covering the Kimi K3 release: an overview of the 2.8-trillion-parameter open-source flagship model, a developer quickstart based on the official Kimi documentation, and Michael Leung's first hands-on test building 3D games with K3 swarm agents. Maintained by Michael Leung, a computer engineer and software developer based in Australia (https://www.michaelleung.info/).

## Key facts about Kimi K3

- Kimi K3 is Kimi's most capable flagship model to date, with 2.8 trillion parameters — the first open-source model in the 3-trillion-parameter class.
- Architecture: Kimi Delta Attention (KDA, a hybrid linear attention mechanism) + Attention Residuals, with Stable LatentMoE activating 16 of 896 experts; roughly 2.5x the scaling efficiency of K2.
- 1M-token context window with automatic context caching; native visual understanding (images and video).
- Strengths: long-horizon agentic coding, knowledge work, and reasoning; excels at game development, frontend engineering and CAD via visual feedback.
- API: OpenAI-compatible at https://api.moonshot.ai/v1, model name "kimi-k3"; thinking mode always on (reasoning_effort="max").
- Full model weights are scheduled for release by 27 July 2026; a technical report will follow.

## Pages

- [Kimi K3 overview](https://kimi.michaelleung.info/): release highlights, architecture, capabilities and references.
- [Kimi K3 Quickstart](https://kimi.michaelleung.info/quickstart.html): API setup, basic call, thinking effort, streaming, vision input, structured output, partial mode, tool calling, dynamic tool loading, 1M context caching, official tools, limits and FAQ.
- [First Test of Kimi K3](https://kimi.michaelleung.info/first-test.html): Michael Leung's hands-on test — a playable 3D web game created after 2 hours of coding with K3 swarm agents, pure agent code, plus his opinion that K3 can beat Claude Fable 5 at coding.

## Sources

- Primary source: Kimi API Platform — Kimi K3 Quickstart: https://platform.kimi.ai/docs/guide/kimi-k3-quickstart (retrieved 17 July 2026)
- Kimi API Platform: https://platform.kimi.ai/
- Michael Leung's LinkedIn post "First Test of Kimi-k3": https://lnkd.in/g85wfeYh

## Contact

- Michael Leung — https://www.michaelleung.info/ — admin@michaelleung.info