Moonshot AI publishes Kimi K3.1 Pro open weights

Moonshot AI has published open weights for Kimi K3.1 Pro on Hugging Face, the first model in its K3.1 series. The model is natively multimodal and agent-oriented, with 2.8 trillion total parameters, 104 billion active parameters, and roughly 1 million tokens of context; the weights are released in MXFP4 quantization. Moonshot also offers an API through platform.kimi.ai under the kimi-k3.1-pro identifier, compatible with OpenAI and Anthropic interfaces. The supplied material does not include verified benchmark results.