Claude Sonnet 5 vs Composer 2
Anthropic Claude Sonnet 5 | Cursor Composer 2 | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Cursor |
| Release date | Jun 30 2026 | Mar 20 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. | — | 73.7% |
Agentic coding CursorBench v3.1Cursor's own test of harder, real-world coding tasks inside a code editor. Higher is better. | 61.2%Best | 52.2% |
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. | — | 61.7% |
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 shipped 102 days before Claude Sonnet 5 | |
Which is better: Claude Sonnet 5 or Composer 2?
Claude Sonnet 5 leads Composer 2 on 1 of the 1 benchmark they both report (CursorBench v3.1). Composer 2 shipped 102 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, Claude Sonnet 5 leads at 61.2% vs Composer 2 at 52.2%.
Frequently asked questions
Claude Sonnet 5 was released by Anthropic on Jun 30 2026.
Composer 2 was released by Cursor on Mar 20 2026.
Claude Sonnet 5 leads on CursorBench v3.1 — Claude Sonnet 5 61.2% vs Composer 2 52.2%.
Other comparisons
Claude Sonnet 5 vs GPT-5.6 SolComposer 2 vs GPT-5.6 SolClaude Sonnet 5 vs Gemini OmniComposer 2 vs Gemini OmniClaude Sonnet 5 vs Muse SparkComposer 2 vs Muse SparkClaude Sonnet 5 vs Grok 4.3 BetaComposer 2 vs Grok 4.3 BetaClaude Sonnet 5 vs DeepSeek-V4-ProComposer 2 vs DeepSeek-V4-ProClaude Sonnet 5 vs Mistral Medium 3.5Composer 2 vs Mistral Medium 3.5