Yunjia (YJ) He

I'm a data researcher at Moonshot AI (Kimi).

My work covers the K2 model family, including K2, K2-Thinking, K2.5, and K2.6, across:

• Training data and RL environments: long-horizon agentic coding, tool use, reasoning, finance, and deep research.
• Evaluation: internal benchmarks for tracking real-world capability.

I also work on Kimi's data acquisition and partnerships.

Before Kimi, I worked across data science and AI research at Alibaba and Ant Group.

I graduated from Zhejiang University with a degree in Data Science in 2022.