Kimi K3: The open-weights escalation
Kimi K3 is the strongest open-weights model ever, closing the US-China gap to 3-5 months
“the open-to-closed or American-to-Chinese model performance gap has been reduced from the debated 6-9 months to something shorter, say 3-5 months.”— Nathan Lambert
Moonshot AI released Kimi K3, a 2.8T parameter MoE model ranking #2-3 on major benchmarks and outpacing all prior open-weights models, with weights dropping July 27th. Nathan Lambert argues this proves Chinese labs are genuine frontier builders—not merely distilling US models—and that the performance gap between open/closed and US/Chinese models has narrowed from 6-9 months to 3-5 months. The release signals a structural shift in the open-weights competitive landscape, with implications for both AI geopolitics and the closed-model moat narrative.