Claude Sonnet 5 vs Composer 2.5
Anthropic Claude Sonnet 5 | Cursor Composer 2.5 | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Cursor |
| Release date | Jun 30 2026 | May 18 2026 |
| Access | Proprietary | Proprietary |
| Benchmarks | ||
Agentic coding SWE-Bench ProCan the AI fix real bugs in real software? It's handed actual problems from open-source projects and has to write code that genuinely solves them. Higher is better. | 63.2% | — |
Multilingual coding SWE-Bench MultilingualLike SWE-Bench, but the coding problems span many programming languages, not just one. Tests how broadly the AI can code. Higher is better. | — | 79.8% |
Agentic coding CursorBench v3.1Cursor's own test of harder, real-world coding tasks inside a code editor. Higher is better. | 61.2% | 63.2%Best |
Agentic terminal coding Terminal-Bench 2.1Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Higher is better. | 80.4% | — |
Agentic terminal coding Terminal-Bench 2.0Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? (Version 2.0 of the test.) Higher is better. | — | 69.3% |
Multidisciplinary reasoning Humanity's Last Exam · no toolsHumanity's Last Exam — extremely hard expert questions across many subjects, written so you can't just look up the answer. “No tools” means the AI answers on its own. Higher is better. | 43.2% | — |
Multidisciplinary reasoning Humanity's Last Exam · with toolsHumanity's Last Exam — extremely hard expert questions across many subjects. “With tools” means the AI is allowed to search the web or run code while answering. Higher is better. | 57.4% | — |
Agentic computer use OSWorld-VerifiedCan the AI actually operate a computer — clicking, typing, and using real apps — to finish tasks on its own? Higher is better. | 81.2% | — |
Knowledge work GDPval-AAMeasures how well the AI does economically valuable knowledge work, judged against human experts. Shown as a rating (like a chess Elo) — higher is better. | 1618 | — |
| Timeline | ||
| Release gap | Composer 2.5 shipped 43 days before Claude Sonnet 5 | |
Which is better: Claude Sonnet 5 or Composer 2.5?
Composer 2.5 leads Claude Sonnet 5 on 1 of the 1 benchmark they both report (CursorBench v3.1). Composer 2.5 shipped 43 days before Claude Sonnet 5, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
On CursorBench v3.1, Composer 2.5 leads at 63.2% vs Claude Sonnet 5 at 61.2%.
Frequently asked questions
Claude Sonnet 5 was released by Anthropic on Jun 30 2026.
Composer 2.5 was released by Cursor on May 18 2026.
Composer 2.5 leads on CursorBench v3.1 — Claude Sonnet 5 61.2% vs Composer 2.5 63.2%.
Other comparisons
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