DeepSeek-V3.1 vs Gemini 3.5 Flash
Direct spec comparison of DeepSeek-V3.1 (from DeepSeek) and Gemini 3.5 Flash (from Google). Want a 3- or 4-way comparison? Open the multi-model tool →
 DeepSeek-V3.1DeepSeek |  Gemini 3.5 Flash | |
|---|---|---|
| Vendor | DeepSeek | |
| Family | DeepSeek | Gemini |
| Release date | 2025-08-21 | 2026-05-20 |
| Context window | 128,000 tokens | — |
| Parameters | 671B | — |
| Modality | text | text, vision, audio |
| License | MIT | proprietary |
| Source | open weights | proprietary |
| Description | Large MoE open-weight model. Predecessor to DeepSeek-V4. | Fast, low-cost tier of the Gemini 3.5 family announced at Google I/O 2026. June 2026 update added native computer-use capability, moving Flash from generation to agentic task execution. |
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