Cursor
The AI Code Editor
5.0•847 reviews•43K followers
The AI Code Editor
5.0•847 reviews•43K followers
Built to make you extraordinarily productive, Cursor is the best way to code with AI.
This is the 9th launch from Cursor. View more
Composer 2.5
Launching today
A substantial improvement in intelligence and behavior over Composer 2, particularly on long-horizon agentic tasks.
Payment Required
Launch Team
Windsurf
opencode
Claude Code
Flowtica Scribe
Hi everyone!
More training scale, still aggressive pricing, and a better model for long-running coding work.
That is Composer 2.5 in a nutshell.
It continues from the same base as Composer 2, and this version is trained to be better at sustained work, complex instructions, communication style, and effort calibration inside Cursor.
Targeted textual feedback helps the model improve specific mistakes inside long rollouts, while 25x more synthetic tasks push it into harder coding problems grounded in real codebases.
Looking forward to the next larger model trained from scratch with 10x more compute!
Specializing a model for code editing workflows rather than pure generation is the right call. Generic models fall apart on multi-file edits because they lose track of interdependencies. Building RetainSure, we've hit that quality cliff when an agent touches more than three or four tightly coupled files. How does Composer 2.5 handle semantic conflicts when simultaneous edits across files introduce inconsistencies?
The effort calibration piece stands out to me. We've had agents lose coherence around step 6 or 7 in a long agentic chain, and it's tough to know if that's model drift or context decay. Curious how the targeted textual feedback is applied: at the step level within a rollout, or on the full trajectory?
The focus on long-horizon agentic tasks is the right unlock for real coding workflows. We've run into this building RetainSure where the model drops context mid-task once the chain gets 20+ steps deep. How does Composer 2.5 handle state management across very long multi-file agentic sessions, and is there a hard limit on task length before it degrades?
Starnus
Love cursor, been a power user for a long time now, and happy to see the native model getting better and better.