Claude 4.6 Sonnet vs DeepSeek-V3.1
Direct spec comparison of Claude 4.6 Sonnet (from Anthropic) and DeepSeek-V3.1 (from DeepSeek). Want a 3- or 4-way comparison? Open the multi-model tool →
 Claude 4.6 SonnetAnthropic |  DeepSeek-V3.1DeepSeek | |
|---|---|---|
| Vendor | Anthropic | DeepSeek |
| Family | Claude | DeepSeek |
| Release date | — | 2025-08-21 |
| Context window | 200,000 tokens | 128,000 tokens |
| Parameters | — | 671B |
| Modality | text, vision | text |
| License | proprietary | MIT |
| Source | proprietary | open weights |
| Description | — | Large MoE open-weight model. Predecessor to DeepSeek-V4. |
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