DeepSeek V3.1 Terminus vs o4-mini
DeepSeek DeepSeek V3.1 Terminus | OpenAI o4-mini | |
|---|---|---|
| Overview | ||
| Company | DeepSeek | OpenAI |
| Release date | Sep 22 2025 | Apr 16 2025 |
| Access | Open Weight | Proprietary |
| 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. | — | 8% |
| Timeline | ||
| Release gap | o4-mini shipped 159 days before DeepSeek V3.1 Terminus | |
Which is better: DeepSeek V3.1 Terminus or o4-mini?
DeepSeek V3.1 Terminus and o4-mini don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. o4-mini shipped 159 days before DeepSeek V3.1 Terminus, so benchmark comparisons should account for the intervening progress.
DeepSeek V3.1 Terminus is open weight, while o4-mini is proprietary.
Direct benchmark comparisons are unavailable — DeepSeek V3.1 Terminus and o4-mini don't publish scores on any of the same benchmarks.
Frequently asked questions
DeepSeek V3.1 Terminus was released by DeepSeek on Sep 22 2025.
o4-mini was released by OpenAI on Apr 16 2025.
DeepSeek V3.1 Terminus is an open weight model released by DeepSeek. o4-mini is a proprietary model released by OpenAI.
Other comparisons
DeepSeek V3.1 Terminus vs Claude Sonnet 5o4-mini vs Claude Sonnet 5DeepSeek V3.1 Terminus vs Gemini Omnio4-mini vs Gemini OmniDeepSeek V3.1 Terminus vs Muse Spark 1.1o4-mini vs Muse Spark 1.1DeepSeek V3.1 Terminus vs Grok 4.5o4-mini vs Grok 4.5DeepSeek V3.1 Terminus vs Mistral Medium 3.5o4-mini vs Mistral Medium 3.5DeepSeek V3.1 Terminus vs Kimi K2.7 Codeo4-mini vs Kimi K2.7 Code