DeepSeek-V4-FlashvsGPT-4o mini
DeepSeek-V4-Flash | GPT-4o mini | |
|---|---|---|
| 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%Best | 2% |
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 | GPT-4o mini shipped 645 days before DeepSeek-V4-Flash | |
| Overview | ||
| Company | DeepSeek | OpenAI |
| Release date | Apr 24 2026 | Jul 18 2024 |
| Access | Open Weight | Proprietary |
Which is better: DeepSeek-V4-Flash or GPT-4o mini?
DeepSeek-V4-Flash leads GPT-4o mini on 1 of the 1 benchmark they both report (BullshitBench v2). GPT-4o mini shipped 645 days before DeepSeek-V4-Flash, so benchmark comparisons should account for the intervening progress.
DeepSeek-V4-Flash is open weight, while GPT-4o mini is proprietary.
On BullshitBench v2, DeepSeek-V4-Flash leads at 18% vs GPT-4o mini at 2%.
Frequently asked questions
DeepSeek-V4-Flash was released by DeepSeek on Apr 24 2026.
GPT-4o mini was released by OpenAI on Jul 18 2024.
DeepSeek-V4-Flash is an open weight model released by DeepSeek. GPT-4o mini is a proprietary model released by OpenAI.
Other comparisons
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