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

The Chinese lab's Kimi K3 packs 2.8 trillion parameters and a 1 million-token context, with Kimi Delta Attention enabling up to 6.3x faster decoding. Benchmarks show it competitive with frontier models like Claude Fable 5, scoring 57 on the Artificial Analysis Intelligence Index comparable to Opus 4.8 and GPT-5.