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 Grok 4xAI |  Gemini 3 Pro |  DeepSeek-R1DeepSeek |  GPT-5.5OpenAI | |
|---|---|---|---|---|
| Vendor | xAI | DeepSeek | OpenAI | |
| Family | Grok | Gemini | DeepSeek | GPT |
| Release date | 2025-07-09 | 2026-04-22 | 2025-01-20 | 2026-04-23 |
| Context window | 256,000 tokens | 2,000,000 tokens | 128,000 tokens | 400,000 tokens |
| Parameters | — | — | 671B | — |
| Modality | text | text, vision, audio, video | text | text, vision, audio |
| License | proprietary | proprietary | MIT | proprietary |
| Source | proprietary | proprietary | open weights | proprietary |
| Description | — | 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. | Reasoning-focused open-weight model. | 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. |
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