DeepSeek V3.1 Terminus vs o3
DeepSeek DeepSeek V3.1 Terminus | OpenAI o3 | |
|---|---|---|
| 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. | — | 26% |
| Timeline | ||
| Release gap | o3 shipped 159 days before DeepSeek V3.1 Terminus | |
Which is better: DeepSeek V3.1 Terminus or o3?
DeepSeek V3.1 Terminus and o3 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. o3 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 o3 is proprietary.
Direct benchmark comparisons are unavailable — DeepSeek V3.1 Terminus and o3 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.
o3 was released by OpenAI on Apr 16 2025.
DeepSeek V3.1 Terminus is an open weight model released by DeepSeek. o3 is a proprietary model released by OpenAI.
Other comparisons
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