Cursor Acknowledges Composer 2 Model Built on Moonshot AI's Open-Source Kimi 2.5

Summary

AI coding tool company Cursor launched its new Composer 2 model, marketing it as offering "frontier-level coding intelligence." Shortly after launch, an X user identified that Composer 2 was built on top of Kimi 2.5, an open-source model released by Chinese AI company Moonshot AI, which is backed by Alibaba and HongShan (formerly Sequoia China). Cursor's VP of developer education Lee Robinson confirmed the open-source base, stating that approximately one-quarter of the compute used for the final