Composer 2.5 vs DeepSeek V3.1 Terminus
Cursor Composer 2.5 | DeepSeek DeepSeek V3.1 Terminus | |
|---|---|---|
| Overview | ||
| Company | Cursor | DeepSeek |
| Release date | May 18 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. | 79.8% | — |
Agentic coding CursorBench v3.1Cursor's own test of harder, real-world coding tasks inside a code editor. Higher is better. | 63.2% | — |
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. | 92% | — |
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% | — |
| Timeline | ||
| Release gap | DeepSeek V3.1 Terminus shipped 238 days before Composer 2.5 | |
Which is better: Composer 2.5 or DeepSeek V3.1 Terminus?
Composer 2.5 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 238 days before Composer 2.5, so benchmark comparisons should account for the intervening progress.
Composer 2.5 is proprietary, while DeepSeek V3.1 Terminus is open weight.
Direct benchmark comparisons are unavailable — Composer 2.5 and DeepSeek V3.1 Terminus don't publish scores on any of the same benchmarks.
Frequently asked questions
Composer 2.5 was released by Cursor on May 18 2026.
DeepSeek V3.1 Terminus was released by DeepSeek on Sep 22 2025.
Composer 2.5 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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