---
id: "2025-07-11-kimi-k2"
url: "https://postcutoff.com/e/2025-07-11-kimi-k2/"
as_of: "2026-11-13T13:49:00+01:00"
date: "2025-07-11"
date_precision: day
category: open-source
importance: 3
confidence: medium
status: [Partly confirmed]
sources: 2
editor: human editor
human_review: null
version: "2026-10-04"
---

As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/e/2025-07-11-kimi-k2/

# Moonshot AI releases Kimi K2, a 1-trillion-parameter open-weights agentic model

Beijing-based Moonshot AI open-sourced Kimi K2, a 1T-parameter mixture-of-experts model (32B active) optimized for agentic tasks and coding, among the strongest open-weight non-reasoning models at release.

## Key facts
- Released 11 July 2025
- 1 trillion total parameters, 32B activated
- Trained with the MuonClip optimizer on 15.5T tokens
- Released under a modified MIT license

## What happened

Moonshot released open weights for a trillion-parameter model focused on tool use and coding.

## Why it matters

Part of a 2025 wave (DeepSeek, Qwen, Kimi, GLM) that made Chinese labs the leaders in open-weight models.

## Your AI and this story

- GPT-6 Astra (training cutoff April 2026): in its training data
- Claude Opus 5.5 (training cutoff June 2026): in its training data
- Gemini 4 Hydrogen (training cutoff March 2026): in its training data
- Grok 4.7 (training cutoff May 2026): in its training data

## Sources

1. [Kimi K2: Open Agentic Intelligence (Moonshot AI)](https://moonshotai.github.io/Kimi-K2/) (moonshotai.github.io, official)
2. [MoonshotAI/Kimi-K2 (code & weights)](https://github.com/MoonshotAI/Kimi-K2) (github.com, code)

## Changes

- 2026-09-29 (filed): Created

## Related

- 2025-01-20: [DeepSeek-R1: open-weights reasoning model rivals o1 and shakes markets](https://postcutoff.com/e/2025-01-20-deepseek-r1/index.md)