Moonshot AI releases open weights for Kimi K3.1 Pro

Moonshot AI published the full weights of its 2.8-trillion-parameter mixture-of-experts Kimi K3.1 Pro (approximately 104 billion active parameters, 1M-token context, multimodal) on Hugging Face on November 4, fulfilling the commitment made at the model’s October launch. The release under a custom license enables self-hosting and fine-tuning of a frontier-class open-weight model competitive on agentic coding and related benchmarks.