Moonshot AI releases Kimi K3 open weights and infrastructure after shaking up the frontier model race

Moonshot AI open-sourced Kimi K3’s model weights on Hugging Face and published its technical report on GitHub.

The company also released supporting infrastructure, including attention kernels, an MoE communication library, and agent-running tools.

Kimi K3 had attracted attention for strong benchmark scores, but outside testing found weaker cyber and math performance.

The release adds a new open-weights contender to the frontier AI race and may shape how developers weigh cost, capability, and openness.