DeepSeek-V4-Flashvso1-preview
DeepSeek-V4-Flash | o1-preview | |
|---|---|---|
| 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 | o1-preview shipped 589 days before DeepSeek-V4-Flash | |
| Overview | ||
| Company | DeepSeek | OpenAI |
| Release date | Apr 24 2026 | Sep 12 2024 |
| Access | Open Weight | Proprietary |
Which is better: DeepSeek-V4-Flash or o1-preview?
DeepSeek-V4-Flash and o1-preview don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. o1-preview shipped 589 days before DeepSeek-V4-Flash, so benchmark comparisons should account for the intervening progress.
DeepSeek-V4-Flash is open weight, while o1-preview is proprietary.
Direct benchmark comparisons are unavailable — DeepSeek-V4-Flash and o1-preview don't publish scores on any of the same benchmarks.
Frequently asked questions
DeepSeek-V4-Flash was released by DeepSeek on Apr 24 2026.
o1-preview was released by OpenAI on Sep 12 2024.
DeepSeek-V4-Flash is an open weight model released by DeepSeek. o1-preview is a proprietary model released by OpenAI.
Other comparisons
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