Claude 3.5 Sonnet (upgraded) vs Composer 1.5
Anthropic Claude 3.5 Sonnet (upgraded) | Cursor Composer 1.5 | |
|---|---|---|
| Overview | ||
| Company | Anthropic | Cursor |
| Release date | Oct 22 2024 | Feb 8 2026 |
| 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% | — |
Next.js coding Next.js EvalsVercel's open eval of how well AI coding agents build and migrate real Next.js apps — measured as the share of tasks the agent completes successfully. Higher is better. | — | 67% |
| Timeline | ||
| Release gap | Claude 3.5 Sonnet (upgraded) shipped 474 days before Composer 1.5 | |
Which is better: Claude 3.5 Sonnet (upgraded) or Composer 1.5?
Claude 3.5 Sonnet (upgraded) and Composer 1.5 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 474 days before Composer 1.5, 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.
Direct benchmark comparisons are unavailable — Claude 3.5 Sonnet (upgraded) and Composer 1.5 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 1.5 was released by Cursor on Feb 8 2026.
Other comparisons
Claude 3.5 Sonnet (upgraded) vs GPT-5.6 SolComposer 1.5 vs GPT-5.6 SolClaude 3.5 Sonnet (upgraded) vs Gemini OmniComposer 1.5 vs Gemini OmniClaude 3.5 Sonnet (upgraded) vs Muse Spark 1.1Composer 1.5 vs Muse Spark 1.1Claude 3.5 Sonnet (upgraded) vs Grok 4.5Composer 1.5 vs Grok 4.5Claude 3.5 Sonnet (upgraded) vs DeepSeek-V4-ProComposer 1.5 vs DeepSeek-V4-ProClaude 3.5 Sonnet (upgraded) vs Mistral Medium 3.5Composer 1.5 vs Mistral Medium 3.5