Compare models
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 Gemini 3 Pro |  DeepSeek-V3.1DeepSeek |  GPT-5OpenAI | |
|---|---|---|---|
| Vendor | DeepSeek | OpenAI | |
| Family | Gemini | DeepSeek | GPT |
| Release date | 2026-04-22 | 2025-08-21 | 2025-08-07 |
| Context window | 2,000,000 tokens | 128,000 tokens | 400,000 tokens |
| Parameters | — | 671B | — |
| Modality | text, vision, audio, video | text | text, vision, audio |
| License | proprietary | MIT | proprietary |
| Source | 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. | Large MoE open-weight model. Predecessor to DeepSeek-V4. | OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026. |
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