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 GPT-5 ProOpenAI |  Gemini 3.5 | Gemini 2.5 Pro |  DeepSeek-R1DeepSeek | |
|---|---|---|---|---|
| Vendor | OpenAI | DeepSeek | ||
| Family | GPT | Gemini | Gemini | DeepSeek |
| Release date | 2025-08-07 | 2026-05-20 | 2025-03-25 | 2025-01-20 |
| Context window | 400,000 tokens | 2,000,000 tokens | 2,000,000 tokens | 128,000 tokens |
| Parameters | — | — | — | 671B |
| Modality | text, vision, audio | text, vision, audio, video | text, vision, audio, video | text |
| License | proprietary | proprietary | proprietary | MIT |
| Source | proprietary | proprietary | proprietary | open weights |
| 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. | Predecessor to Gemini 3 Pro. | Reasoning-focused open-weight model. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | — | 88.9% | 84.1% | — |
| GPQA-D | — | 91.2% | 84.0% | — |
| AIME-25 | — | 96.1% | — | 79.8% |
| MMMU | — | 86.0% | 72.4% | — |
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