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 Claude 4.6 SonnetAnthropic |  DeepSeek-V4-ProDeepSeek | DeepSeek-R1 DeepSeek |  GPT-5OpenAI | |
|---|---|---|---|---|
| Vendor | Anthropic | DeepSeek | DeepSeek | OpenAI |
| Family | Claude | DeepSeek | DeepSeek | GPT |
| Release date | — | 2026-04-22 | 2025-01-20 | 2025-08-07 |
| Context window | 200,000 tokens | 1,000,000 tokens | 128,000 tokens | 400,000 tokens |
| Parameters | — | 1.6T (49B active) | 671B | — |
| Modality | text, vision | text | text | text, vision, audio |
| License | proprietary | MIT | MIT | proprietary |
| Source | proprietary | open weights | open weights | proprietary |
| 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. | Reasoning-focused open-weight model. | OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026. |
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