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 DeepSeek-V4-FlashDeepSeek |  GPT-5.5OpenAI |  Mistral Large 2Mistral | DeepSeek-R1 DeepSeek | |
|---|---|---|---|---|
| Vendor | DeepSeek | OpenAI | Mistral | DeepSeek |
| Family | DeepSeek | GPT | Mistral | DeepSeek |
| Release date | 2026-04-22 | 2026-04-23 | 2024-07-24 | 2025-01-20 |
| Context window | 1,000,000 tokens | 400,000 tokens | 128,000 tokens | 128,000 tokens |
| Parameters | 284B (13B active) | — | 123B | 671B |
| Modality | text | text, vision, audio | text | text |
| License | MIT | proprietary | Mistral Research License | MIT |
| Source | open weights | proprietary | open weights | open weights |
| Description | Smaller, faster sibling to DeepSeek-V4-Pro. Same 1M context window with a much lighter 284B / 13B-active MoE. | 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. | — | Reasoning-focused open-weight model. |
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