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 GPT-5 ProOpenAI |  Gemini 3.5 |  DeepSeek-R1DeepSeek | o3 OpenAI | |
|---|---|---|---|---|
| Vendor | OpenAI | DeepSeek | OpenAI | |
| Family | GPT | Gemini | DeepSeek | o-series |
| Release date | 2025-08-07 | 2026-05-20 | 2025-01-20 | 2025-04-16 |
| Context window | 400,000 tokens | 2,000,000 tokens | 128,000 tokens | 200,000 tokens |
| Parameters | — | — | 671B | — |
| Modality | text, vision, audio | text, vision, audio, video | text | text, vision |
| License | proprietary | proprietary | MIT | proprietary |
| Source | proprietary | proprietary | open weights | proprietary |
| Description | Higher-reasoning variant of GPT-5, used for harder scientific and research tasks (e.g., immunology breakthroughs at NIH). Same 400K context as GPT-5; trades latency for depth. | Google DeepMind's next-gen Gemini — positioned as "frontier intelligence with action". Built for complex agentic workflows. Announced at Google I/O 2026. | Reasoning-focused open-weight model. | Reasoning-focused model in the o-series. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | — | 88.9% | — | — |
| GPQA-D | — | 91.2% | — | 87.7% |
| AIME-25 | — | 96.1% | 79.8% | 88.9% |
| MMMU | — | 86.0% | — | — |
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Mistral Large 2maxMax 4 models. Remove one to add another.