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 o3OpenAI |  Gemini 3 Pro |  DeepSeek-V3.1DeepSeek | Gemini 2.5 Flash | |
|---|---|---|---|---|
| Vendor | OpenAI | DeepSeek | ||
| Family | o-series | Gemini | DeepSeek | Gemini |
| Release date | 2025-04-16 | 2026-04-22 | 2025-08-21 | — |
| Context window | 200,000 tokens | 2,000,000 tokens | 128,000 tokens | 1,000,000 tokens |
| Parameters | — | — | 671B | — |
| Modality | text, vision | text, vision, audio, video | text | text, vision, audio |
| License | proprietary | proprietary | MIT | proprietary |
| Source | proprietary | proprietary | open weights | proprietary |
| Description | Reasoning-focused model in the o-series. | 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. | — |
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Gemini 2.5 Flash✓
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Mistral Large 2maxMax 4 models. Remove one to add another.