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Chinese AI Startup Moonshot AI Releases Kimi K3, the World's First 2.8 Trillion Parameter Open-Weight Model

The Chinese artificial intelligence startup stripped cyberattack data from its training corpus to prevent the model from extending the frontier of software exploitation.

Factlen Newsroom· Updated

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Illustration: Moonshot AI stripped cyberattack-related data from its training corpus to restrict the offensive capabilities of its new Kimi K3.1 Pro model.From: Moonshot AI Restricts Hacking Capabilities in Kimi K3.1 Pro Ahead of Open-Weight Release

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Moonshot's internal testing showed a drop in exploit success after cyber-related data was removed.From: Moonshot AI Restricts Hacking Capabilities in Kimi K3.1 Pro Ahead of Open-Weight Release ·
Despite the removal of hacking data, Kimi K3.1 Pro remains highly competitive on general coding benchmarks.From: Moonshot AI Restricts Hacking Capabilities in Kimi K3.1 Pro Ahead of Open-Weight Release ·
Kimi K3 uses a sparse Mixture-of-Experts design, activating only a fraction of its parameters at any one time.From: Chinese AI Startup Moonshot AI Releases Kimi K3, the World's First 2.8 Trillion Parameter Open-Weight Model ·
Independent benchmarks place Kimi K3 ahead of previous-generation proprietary models, though slightly behind current state-of-the-art systems.From: Chinese AI Startup Moonshot AI Releases Kimi K3, the World's First 2.8 Trillion Parameter Open-Weight Model ·
While the weights are open to download, Moonshot AI imposes strict commercial licensing requirements on large enterprises.From: Chinese AI Startup Moonshot AI Releases Kimi K3, the World's First 2.8 Trillion Parameter Open-Weight Model ·
Illustration: Security researchers warn that open-weight models could automate vulnerability discovery if released without safeguards.From: Moonshot AI Restricts Hacking Capabilities in Kimi K3.1 Pro Ahead of Open-Weight Release ·
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Open-weight models like Kimi K3 allow developers to build advanced, self-hosted AI applications without relying on external APIs.From: Chinese AI Startup Moonshot AI Releases Kimi K3, the World's First 2.8 Trillion Parameter Open-Weight Model ·

Timeline

October 2026

  1. Moonshot AI Restricts Hacking Capabilities in Kimi K3.1 Pro Ahead of Open-Weight Release

August 2026

  1. Chinese AI Startup Moonshot AI Releases Kimi K3, the World's First 2.8 Trillion Parameter Open-Weight Model