ComposervsDeepSeek-V4-Flash
Composer | DeepSeek-V4-Flash | |
|---|---|---|
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | — | 18% |
Competitive coding LiveCodeBenchCoding problems published so recently the AI can't have seen them in training — a contamination-free test of raw programming skill. Higher is better. | — | 91.6% |
Science GPQA DiamondGraduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | — | 88.1% |
| Timeline | ||
| Release gap | Composer shipped 177 days before DeepSeek-V4-Flash | |
| Overview | ||
| Company | Cursor | DeepSeek |
| Release date | Oct 29 2025 | Apr 24 2026 |
| Access | Proprietary | Open Weight |
Which is better: Composer or DeepSeek-V4-Flash?
Composer and DeepSeek-V4-Flash don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Composer shipped 177 days before DeepSeek-V4-Flash, so benchmark comparisons should account for the intervening progress.
Composer is proprietary, while DeepSeek-V4-Flash is open weight.
Direct benchmark comparisons are unavailable — Composer and DeepSeek-V4-Flash don't publish scores on any of the same benchmarks.
Frequently asked questions
Composer was released by Cursor on Oct 29 2025.
DeepSeek-V4-Flash was released by DeepSeek on Apr 24 2026.
Composer is a proprietary model released by Cursor. DeepSeek-V4-Flash is an open weight model released by DeepSeek.
Other comparisons
ComposervsClaude Sonnet 5DeepSeek-V4-FlashvsClaude Sonnet 5ComposervsGPT-5.6 SolDeepSeek-V4-FlashvsGPT-5.6 SolComposervsGemini 3.6 FlashDeepSeek-V4-FlashvsGemini 3.6 FlashComposervsMuse Spark 1.1DeepSeek-V4-FlashvsMuse Spark 1.1ComposervsGrok 4.5DeepSeek-V4-FlashvsGrok 4.5ComposervsMistral Medium 3.5DeepSeek-V4-FlashvsMistral Medium 3.5