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 Superseded by GPT-5.5 in April 2026.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