Composer 2.5 launches in Cursor with greater intelligence and new RL methods

Composer 2.5 is now available in Cursor, delivering substantial improvements in intelligence and reliability for long-running tasks and complex instructions. The update features targeted RL with textual feedback and a significant expansion in synthetic tasks, enhancing the model's robustness.

Composer 2.5 also introduces new training architectures like sharded Muon and dual mesh HSDP to support large-scale optimization.