Kimi K3: 2.8T-parameter open-weight model launched by Moonshot AI

Kimi K3 is a 2.8T-parameter open-weight model with 1M context and native multimodal. It scores 57 on the Artificial Analysis Intelligence Index, comparable to Opus 4.8 and GPT-5. Kimi Delta Attention enables up to 6.3x faster decoding, and Attention Residuals deliver ~25% higher training efficiency.