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OpenAI | DeepSeek | Anthropic | OpenAI | |
|---|---|---|---|---|
| Vendor | OpenAI | DeepSeek | Anthropic | OpenAI |
| Family | GPT | DeepSeek | Claude | GPT |
| Release date | 2025-08-07 | 2025-01-20 | — | 2025-04-14 |
| Context window | 400,000 tokens | 128,000 tokens | 200,000 tokens | 1,000,000 tokens |
| Parameters | — | 671B | — | — |
| Modality | text, vision, audio | text | text, vision | text, vision |
| License | proprietary | MIT | proprietary | proprietary |
| Source | proprietary | open weights | proprietary | proprietary |
| Description | OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026. | Reasoning-focused open-weight model. | — | — |
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