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 DeepSeek-V4-ProDeepSeek |  Grok 4xAI |  GPT-5.5OpenAI |  Gemini 3 Pro | |
|---|---|---|---|---|
| Vendor | DeepSeek | xAI | OpenAI | |
| Family | DeepSeek | Grok | GPT | Gemini |
| Release date | 2026-04-22 | 2025-07-09 | 2026-04-23 | 2026-04-22 |
| Context window | 1,000,000 tokens | 256,000 tokens | 400,000 tokens | 2,000,000 tokens |
| Parameters | 1.6T (49B active) | — | — | — |
| Modality | text | text | text, vision, audio | text, vision, audio, video |
| License | MIT | proprietary | proprietary | proprietary |
| Source | open weights | proprietary | proprietary | 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. | — | 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. | Google DeepMind's flagship multimodal model. Best-in-class for multimodal understanding and agentic / vibe coding workflows. A "Deep Think" reasoning mode is available to AI Ultra subscribers. |
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