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 DeepSeek-V4-ProDeepSeek |  GPT-5.5OpenAI | DeepSeek-V3.1 DeepSeek |  Mistral Large 2Mistral | |
|---|---|---|---|---|
| Vendor | DeepSeek | OpenAI | DeepSeek | Mistral |
| Family | DeepSeek | GPT | DeepSeek | Mistral |
| Release date | 2026-04-22 | 2026-04-23 | 2025-08-21 | 2024-07-24 |
| Context window | 1,000,000 tokens | 400,000 tokens | 128,000 tokens | 128,000 tokens |
| Parameters | 1.6T (49B active) | — | 671B | 123B |
| Modality | text | text, vision, audio | text | text |
| License | MIT | proprietary | MIT | Mistral Research License |
| Source | open weights | proprietary | open weights | open weights |
| Description | DeepSeek's flagship open-weight MoE. 1.6T parameters with 49B activated, 1M-token context, and a hybrid attention scheme (CSA + HCA) that delivers long-context inference at ~27% of V3.2's FLOPs. | OpenAI's smartest and most intuitive model — successor to GPT-5, with major coding, research, and document workflow gains. GPT-5.5 Pro variant also available for heavier reasoning. | Large MoE open-weight model. Predecessor to DeepSeek-V4. | — |
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