Moonshot AI launches Kimi K3: 2.8T parameters, open-weight

Kimi K3 has 2.8 trillion parameters, a 1M token context window, and native multimodal capabilities. It ranks 3rd on VoxelBench and scores 57 on the Artificial Analysis Intelligence Index, comparable to Opus 4.8 and GPT-5. The model uses Kimi Delta Attention for up to 6.3x faster decoding and Attention Residuals for ~25% training efficiency.