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

Kimi K3 features 2.8 trillion parameters, 1 million context, and native multimodal capabilities. It ranks 3rd on VoxelBench behind Fable 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 in long contexts.