Cursor Built Its Own Model. It Matches Opus 4.7 at 10-60x Lower Cost.

The coding agent wars just entered a new phase. Cursor isn't just an IDE anymore. It's a model company.

Cursor released Composer 2.5 on May 18 with a custom agentic coding model trained using 25x more synthetic tasks than Composer 2 and a novel "targeted textual feedback" approach. The results: 79.8% on SWE-bench Multilingual, within 1 point of Opus 4.7, ahead of GPT-5.5. It ranks 3rd on the Artificial Analysis Coding Agent Index.

The pricing tells the real story. $0.50 per million input tokens. $2.50 per million output. That's 10-60x cheaper than the two models above it on the leaderboard. For the same quality tier.

This is the direct answer to the cost problem in story #1. If your agent workflow burns through tokens on routine coding subtasks, you don't need frontier models for every call. You need a purpose-built model that handles the 80% of work that's well-defined. Cursor just built one.

The update also ships full-screen agent tabs, a floating prompt bar, and configurable tool call density. That last feature matters more than it sounds. You can tune how aggressively the agent uses tools based on your cost tolerance. High density for complex refactors, low density for simple edits. It's a cost dial disguised as a UX feature.

I've been running Claude Code in my personal projects for months, and I'm not switching. But I can see the strategy here. Cursor is betting that most coding work doesn't need the most expensive model. They're probably right. If you're paying for frontier-tier tokens on tasks like "add a loading spinner" or "rename this variable across 12 files," you're overpaying by an order of magnitude.

The competitive pressure is real. Anthropic, OpenAI, and Google are all selling general-purpose intelligence at premium prices. Cursor just proved that a purpose-built model trained specifically for code can match them where it counts and undercut them everywhere else. Watch for more IDE companies to follow. The model layer is no longer someone else's problem.