DeepSeek DeepSeek V3.1 Terminus vs Google Gemini 3.1 Flash — side-by-side specs.
DeepSeek DeepSeek V3.1 Terminus | Google Gemini 3.1 Flash | |
|---|---|---|
| Overview | ||
| Company | DeepSeek | |
| Release date | Sep 22 2025 | Feb 26 2026 |
| Model type | — | — |
| Open source | Yes | No |
| Specifications | ||
Parameters | — | — |
Context window | — | — |
| Benchmarks | ||
Science reasoning GPQA Diamond | — | — |
Software engineering SWE-Bench Verified | — | — |
Multimodal understanding MMMU | — | — |
| Timeline | ||
| Release gap | DeepSeek V3.1 Terminus shipped 157 days before Gemini 3.1 Flash | |
DeepSeek V3.1 Terminus and Gemini 3.1 Flash do not have directly comparable benchmark scores published on GPQA Diamond, SWE-Bench Verified, or MMMU. DeepSeek V3.1 Terminus shipped 157 days before Gemini 3.1 Flash, so benchmark comparisons should account for the intervening progress.
DeepSeek V3.1 Terminus is an open-source / open-weight model; Gemini 3.1 Flash is proprietary.
Direct benchmark comparisons are unavailable — at least one of these models has not published scores on GPQA Diamond, SWE-Bench Verified, or MMMU.