Moonshot AI Releases Kimi K3.1 Pro, a New Multimodal Agentic Model on Hugging Face
Moonshot AI has announced the release of Kimi K3.1 Pro, an open-weight, natively multimodal agentic model, now available on Hugging Face. This model is described as the most capable 3T-class model developed by the company to date. Kimi K3.1 Pro is an advancement from its predecessor, Kimi K3, having undergone extensive post-training with large-scale joint reinforcement learning across numerous downstream domains. Key architectural features include a Mixture-of-Experts (MoE) design, 2.8 trillion total parameters with 104 billion activated parameters, 93 layers, and a substantial 1-million-token context window. The model incorporates KDA & Gated DSA attention mechanisms and the SiTU-GLU activation function. Additionally, it integrates a MoonViT-V2 vision encoder, which itself contains 401 million parameters. Moonshot AI highlights significant improvements in areas such as coding, 3D creation, financial research, and factual accuracy, alongside enhanced agentic capabilities. The release on Hugging Face includ...