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Moonshot AI published the open weights for Kimi K3.1 Pro at moonshotai/Kimi-K3.1-Pro on Hugging Face, fulfilling the open-weight date it set when the model launched in apps and API on October 23. The model card describes an open-weight, natively multimodal agentic MoE with 2.8 trillion total parameters and 104 billion activated, 93 layers (69 KDA plus 24 Gated DSA), a 1,048,576-token context, MoonViT-V2 vision (401M parameters), and MXFP4 weights with MXFP8 activations from quantization-aware training. Text and image are supported. The Kimi K3.1-Pro license allows use, modification, fine-tuning, and redistribution with conditions. Model-as-a-Service businesses above $20 million revenue in any consecutive 12 months need a separate Moonshot agreement before commercial use. Products above 100 million monthly active users or $20 million monthly revenue must display "Kimi K3.1-Pro" prominently. Those two conditions do not apply to internal use or to access through Moonshot's official products or certified inference partners.
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