Kimi K3 climbs to #4 on Artificial Analysis' intelligence index

Moonshot AI's Kimi K3 is now the highest-ranked open-weight model on Artificial Analysis' intelligence index, ahead of Claude Opus 4.8, and Moonshot has reportedly suspended new subscriptions due to demand. Nathan Lambert calls it "the open-weights escalation" — a marker of how fast the gap to closed frontier labs is closing.