Moonshot AI releases Kimi K3.1 Pro, 3 points behind Claude Opus 5.5 on intelligence index

Chinese AI model Kimi K3.1 Pro is closing in on Anthropic's Claude Opus 5.5

Moonshot AI released the reasoning model Kimi K3.1 Pro. It scores 55 on the Artificial Analysis Intelligence Index, ranking fourth, 11 points above Kimi K3 and 3 points behind Claude Opus 5.5.

Why it matters: Kimi K3.1 Pro adds 11 index points at the same model scale, while cost per test task drops from $2.00 to $1.98.