Composer is a new model we built at Cursor. We used RL to train a big MoE model to be really good at real-world coding, and also very fast. Excited for the potential of building specialized models to help in critical domains.

Our benchmark comparisons of the model.

One personal reflection is how interesting a general-purpose challenge RL is. Unlike other ML system, you can't abstract much from the full-scale system. Roughly, we co-designed this project and Cursor together in order to allow running the agent at the necessary scale.

One personal reflection is how interesting a challenge RL is. Unlike other ML systems, you can't abstract much from the full-scale system. Roughly, we co-designed this project and Cursor together in order to allow running the agent at the necessary scale.

@ArtemR That being said, you should try it on your codebase. These models are all very good at this point, and I have been surprised at the results.