Composer 2 vs DeepSeek V3.1 Terminus
Cursor Composer 2 | DeepSeek DeepSeek V3.1 Terminus | |
|---|---|---|
| Overview | ||
| Company | Cursor | DeepSeek |
| Release date | Mar 20 2026 | Sep 22 2025 |
| Access | Proprietary | Open Weight |
| Benchmarks | ||
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. | 52.2% | — |
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. | 75% | — |
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% | — |
| Timeline | ||
| Release gap | DeepSeek V3.1 Terminus shipped 179 days before Composer 2 | |
Which is better: Composer 2 or DeepSeek V3.1 Terminus?
Composer 2 and DeepSeek V3.1 Terminus don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. DeepSeek V3.1 Terminus shipped 179 days before Composer 2, so benchmark comparisons should account for the intervening progress.
Composer 2 is proprietary, while DeepSeek V3.1 Terminus is open weight.
Direct benchmark comparisons are unavailable — Composer 2 and DeepSeek V3.1 Terminus don't publish scores on any of the same benchmarks.
Frequently asked questions
Composer 2 was released by Cursor on Mar 20 2026.
DeepSeek V3.1 Terminus was released by DeepSeek on Sep 22 2025.
Composer 2 is a proprietary model released by Cursor. DeepSeek V3.1 Terminus is an open weight model released by DeepSeek.
Other comparisons
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