Composer 2.5 as the Default Coding Model in Cursor

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

Topics: AI Dev Tools & Productivity, LLM Fundamentals · Level: beginner

Summary

The creator switched Cursor's default model to Composer 2.5 because it is good, fast and cheaper. He plans to keep testing it to see whether it can replace GPT 5.5 and Opus 4.7 for daily coding. The takeaway is to judge coding models on quality, speed and cost, not benchmarks alone.

Key points

• Composer 2.5 is Cursor's in-house coding model
• Creator's view: pretty good, fast and cheaper than frontier models
• He is testing whether it can replace GPT 5.5 and Opus 4.7
• Compare models on quality, latency and cost for your real workflow

Resources mentioned

• 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
• 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), Cursor Launches Composer 2.5 with Doubled Usage for a Week (Melvin Vivas on X · notes) and 1 more
• GPT 5.5 · tool · openai.com · paid
  OpenAI models the creator used as the coding model inside Cursor.
  Also in: Models That Work With the Hermes Agent for Personal Productivity (Melvin Vivas on X · notes), Running GPT-5.5 via Codex as Hermes's Main Model (Melvin Vivas on X · notes), Conductor Walkthrough: Running Parallel Coding Agents in Isolated Git Worktrees (Melvin Vivas on X · notes), Which AI coding model to use for which task (Melvin Vivas on X · notes) and 2 more
• Claude Opus 4.7 · tool · anthropic.com · paid
  Anthropic's top Opus model, aimed at long-running agentic tasks that need precise instruction following.
  Also in: Shipping Features Fast in Cursor with Multiple AI Models (Melvin Vivas on X · notes), Which AI coding model to use for which task (Melvin Vivas on X · notes), Claude Opus 4.7 Fast Mode in Cursor: Speed vs. Cost Trade-off (Melvin Vivas on X · notes), Claude Design: Anthropic Labs' Tool for Prototypes, Slides and One-Pagers (Melvin Vivas on X · notes) and 2 more

Try this

• Try Composer 2.5 in Cursor and compare it with frontier models on your own tasks