Cursor 3 Just Shipped a Coding Model Trained From Scratch. Here's Why That Changes the Stack.

Cursor 3 launched with Composer 2, Anysphere’s in-house coding model trained from scratch on its own infrastructure.

The release adds parallel agents, Design Mode, BugBot, Ghost Mode, and local-to-cloud handoff for more agentic workflows.

Cursor still keeps major external models in the picker, but the big shift is running these workflows on Anysphere’s own stack.

The article argues the main story is economics and throughput, not just benchmark wins, enabling faster and cheaper coding agents.