Kimi K3 Just Went #1 on Frontend Code: The CRAZY Demos, Prices and What It Still Loses

Kimi K3 (Moonshot AI) took #1 on Arena's Frontend Code leaderboard at 1679 points, ahead of Claude Fable 5 (1631) and GPT-5.6 Sol (1618). Here are Kimi's own demos, benchmark table, price and limits. The open weights are not out yet (promised by July 27) and I have not run K3 myself: everything here is Kimi's claims and Arena's votes. Chapters 0:00 K3 takes #1 on Arena Frontend Code 0:12 The catch: open weights not out yet 0:36 What K3 is: 2.8T MoE, 1M context 1:01 How it's built 1:19 Arena: #1 in 6 of 7 domains 1:34 Kimi's demos: games, 3D, dashboards 2:22 Kernels, MiniTriton compiler, chip d