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 o3OpenAI |  Gemini 3.5 | Gemini 2.5 Pro |  DeepSeek-V3.1DeepSeek | |
|---|---|---|---|---|
| Vendor | OpenAI | DeepSeek | ||
| Family | o-series | Gemini | Gemini | DeepSeek |
| Release date | 2025-04-16 | 2026-05-20 | 2025-03-25 | 2025-08-21 |
| Context window | 200,000 tokens | 2,000,000 tokens | 2,000,000 tokens | 128,000 tokens |
| Parameters | — | — | — | 671B |
| Modality | text, vision | text, vision, audio, video | text, vision, audio, video | text |
| License | proprietary | proprietary | proprietary | MIT |
| Source | proprietary | proprietary | proprietary | open weights |
| Description | Reasoning-focused model in the o-series. | Google DeepMind's next-gen Gemini — positioned as "frontier intelligence with action". Built for complex agentic workflows. Announced at Google I/O 2026. | Predecessor to Gemini 3 Pro. | Large MoE open-weight model. Predecessor to DeepSeek-V4. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | — | 88.9% | 84.1% | — |
| GPQA-D | 87.7% | 91.2% | 84.0% | — |
| AIME-25 | 88.9% | 96.1% | — | — |
| MMMU | — | 86.0% | 72.4% | — |
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