DeepSeek-V3.1 vs DeepSeek-V4-Flash
Direct spec comparison of DeepSeek-V3.1 (from DeepSeek) and DeepSeek-V4-Flash (from DeepSeek). Want a 3- or 4-way comparison? Open the multi-model tool →
 DeepSeek-V3.1DeepSeek | DeepSeek-V4-Flash DeepSeek | |
|---|---|---|
| Vendor | DeepSeek | DeepSeek |
| Family | DeepSeek | DeepSeek |
| Release date | 2025-08-21 | 2026-04-22 |
| Context window | 128,000 tokens | 1,000,000 tokens |
| Parameters | 671B | 284B (13B active) |
| Modality | text | text |
| License | MIT | MIT |
| Source | open weights | open weights |
| Description | Large MoE open-weight model. Predecessor to DeepSeek-V4. | Smaller, faster sibling to DeepSeek-V4-Pro. Same 1M context window with a much lighter 284B / 13B-active MoE. |
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