DeepSeek V3.1 vs Gemini 2.5 Flash
DeepSeek DeepSeek V3.1 | Google Gemini 2.5 Flash | |
|---|---|---|
| Overview | ||
| Company | DeepSeek | |
| Release date | Aug 21 2025 | Apr 17 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. | — | 19% |
| Timeline | ||
| Release gap | Gemini 2.5 Flash shipped 126 days before DeepSeek V3.1 | |
Which is better: DeepSeek V3.1 or Gemini 2.5 Flash?
DeepSeek V3.1 and Gemini 2.5 Flash don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Gemini 2.5 Flash shipped 126 days before DeepSeek V3.1, so benchmark comparisons should account for the intervening progress.
DeepSeek V3.1 is open weight, while Gemini 2.5 Flash is proprietary.
Direct benchmark comparisons are unavailable — DeepSeek V3.1 and Gemini 2.5 Flash don't publish scores on any of the same benchmarks.
Frequently asked questions
DeepSeek V3.1 was released by DeepSeek on Aug 21 2025.
Gemini 2.5 Flash was released by Google on Apr 17 2025.
DeepSeek V3.1 is an open weight model released by DeepSeek. Gemini 2.5 Flash is a proprietary model released by Google.
Other comparisons
DeepSeek V3.1 vs Claude Sonnet 5Gemini 2.5 Flash vs Claude Sonnet 5DeepSeek V3.1 vs GPT-5.6 SolGemini 2.5 Flash vs GPT-5.6 SolDeepSeek V3.1 vs Muse Spark 1.1Gemini 2.5 Flash vs Muse Spark 1.1DeepSeek V3.1 vs Grok 4.5Gemini 2.5 Flash vs Grok 4.5DeepSeek V3.1 vs Mistral Medium 3.5Gemini 2.5 Flash vs Mistral Medium 3.5DeepSeek V3.1 vs Kimi K2.7 CodeGemini 2.5 Flash vs Kimi K2.7 Code