Key Takeaways On July 17, Moonshot released K3, a 2.8T open-weight LLM specialized in long- horizon tasks, knowledge work, and reasoning, with full weights to be released before July 27. K3 uses original algorithm innovations—Kimi Delta Attention and Attention Residual—to improve compute efficiency. In Artificial Analysis ranking, K3 ranks no. 3 globally, only behind two top US LLMs. In Arena.ai's coding leaderboard, K3 ranks no.1 globally. Its API price is the highest among leading Chinese LLMs, narrowing ...