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 DeepSeek-V4-FlashDeepSeek |  Mistral Large 2Mistral | DeepSeek-V4-Pro DeepSeek |  GPT-5.5OpenAI | |
|---|---|---|---|---|
| Vendor | DeepSeek | Mistral | DeepSeek | OpenAI |
| Family | DeepSeek | Mistral | DeepSeek | GPT |
| Release date | 2026-04-22 | 2024-07-24 | 2026-04-22 | 2026-04-23 |
| Context window | 1,000,000 tokens | 128,000 tokens | 1,000,000 tokens | 400,000 tokens |
| Parameters | 284B (13B active) | 123B | 1.6T (49B active) | — |
| Modality | text | text | text | text, vision, audio |
| License | MIT | Mistral Research License | MIT | proprietary |
| Source | open weights | open weights | open weights | proprietary |
| Description | Smaller, faster sibling to DeepSeek-V4-Pro. Same 1M context window with a much lighter 284B / 13B-active MoE. | — | 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. |
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