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Moonshot AI Open-Sources Kimi K3, a 2.8T-Parameter Frontier Model

Moonshot AI has made its Kimi K3 model open-weight, making the full weights available on Hugging Face and GitHub. Kimi K3 is a native multimodal Mixture-of-Experts (MoE) model with 2.8 trillion total parameters and a 1-million-token context window. It is designed for long-horizon coding, research, multimodal understanding, agentic knowledge work, and complex reasoning tasks.

Why it matters

Open-sourcing such a large and capable frontier model allows researchers and developers to directly download, inspect, fine-tune, and adapt it, potentially fostering significant innovation in various AI applications.

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