Composer 2.5 Narrows the Gap to Claude Opus 4.7 with Ten‑Fold Cost Savings

Composer 2.5, the latest AI‑coding model from Cursor, claims near‑par performance with Claude 4.7 Opus and GPT‑5.5 while delivering up to ten‑times higher efficiency and a pricing model of $0.5 per M input tokens and $2.5 per M output tokens, backed by novel reinforcement‑learning tricks, massive synthetic data, and a custom Muon optimizer with dual‑grid HSDP architecture.

AI programmingComposer 2.5HSDP

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Composer 2.5 Narrows the Gap to Claude Opus 4.7 with Ten‑Fold Cost Savings

Machine Heart

May 18, 2026 · Artificial Intelligence

Composer 2.5 Delivers Opus‑level Performance at One‑Tenth the Cost

Composer 2.5, Cursor’s latest LLM, matches Claude Opus 4.7‑level capabilities while costing roughly one‑tenth as much, thanks to larger training scale, precise text‑feedback reinforcement learning, 25× more synthetic tasks, and a new Muon‑HSDP optimizer that boosts efficiency up to ten‑fold.

Composer 2.5LLMMuon optimizer

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Composer 2.5 Delivers Opus‑level Performance at One‑Tenth the Cost