DeepSeek-V3.1 vs Gemini 3.5
Direct spec comparison of DeepSeek-V3.1 (from DeepSeek) and Gemini 3.5 (from Google). Want a 3- or 4-way comparison? Open the multi-model tool →
 DeepSeek-V3.1DeepSeek |  Gemini 3.5 | |
|---|---|---|
| Vendor | DeepSeek | |
| Family | DeepSeek | Gemini |
| Release date | 2025-08-21 | 2026-05-20 |
| Context window | 128,000 tokens | 2,000,000 tokens |
| Parameters | 671B | — |
| Modality | text | text, vision, audio, video |
| License | MIT | proprietary |
| Source | open weights | proprietary |
| Description | Large MoE open-weight model. Predecessor to DeepSeek-V4. | Google DeepMind's next-gen Gemini — positioned as "frontier intelligence with action". Built for complex agentic workflows. Announced at Google I/O 2026. |
| Links | ||
| Benchmarks | ||
| MMLU-Pro | — | 88.9% |
| GPQA-D | — | 91.2% |
| AIME-25 | — | 96.1% |
| MMMU | — | 86.0% |
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