Claude 3.5 Sonnet (upgraded) vs Composer
Anthropic Claude 3.5 Sonnet (upgraded) | Cursor Composer | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Cursor |
| Release date | Oct 22 2024 | Oct 29 2025 |
| Access | Proprietary | Proprietary |
| Benchmarks | ||
Coding SWE-Bench VerifiedReal coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | 49% | — |
| Timeline | ||
| Release gap | Claude 3.5 Sonnet (upgraded) shipped 372 days before Composer | |
Which is better: Claude 3.5 Sonnet (upgraded) or Composer?
Claude 3.5 Sonnet (upgraded) and Composer don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude 3.5 Sonnet (upgraded) shipped 372 days before Composer, 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.
Direct benchmark comparisons are unavailable — Claude 3.5 Sonnet (upgraded) and Composer don't publish scores on any of the same benchmarks.
Frequently asked questions
Claude 3.5 Sonnet (upgraded) was released by Anthropic on Oct 22 2024.
Composer was released by Cursor on Oct 29 2025.
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