Composer 2.5: Cursor's Model for Long-Running Agentic Tasks

Melvin Vivas · X post · 2026-05-19 · Open on X

Topics: AI Dev Tools & Productivity, Industry Trends & Job Market · Level: beginner

Summary

Cursor's launch post says Composer 2.5 is more intelligent, better at sustained work on long-running tasks, and more reliable at following complex instructions. The creator says the benchmarks look very strong.

Key points

• Claimed gains: intelligence, long-running task endurance, following complex instructions
• Included usage was doubled for the launch week
• Check the benchmarks yourself, then test on your own codebase

Resources mentioned

• Composer 2.5 · tool · cursor.com · paid
  Cursor's in-house coding model, focused on speed and low cost.
  Also in: First Look at Grok Build CLI: Closer to opencode than Claude Code (Melvin Vivas on X · notes), One-Shot CRM App with Grok Build + Composer 2.5 (Melvin Vivas on X · notes), Sharing Canvases and Design Mode Edits in Cursor (Melvin Vivas on X · notes), Composer 2.5 as the Default Coding Model in Cursor (Melvin Vivas on X · notes) and 1 more
• Cursor · tool · x.com · free · recommended by both Bashiri Smith & Melvin Vivas
  AI-native code editor (VS Code with AI built in).
  Also in: GLM 5.3 and GLM 5.3 Flash now in Cursor (Melvin Vivas on X · notes), Grok Bot Can Now Hand Off Coding Tasks to Cursor (Melvin Vivas on X · notes), Why Plan Mode Still Matters in AI Coding Assistants (Codex, Claude, Cursor) (Melvin Vivas on X · notes), Why Plan Mode Still Matters in AI Coding Agents (Codex, Claude, Cursor) (Melvin Vivas on X · notes) and 121 more