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 o3OpenAI |  Gemini 2.5 Pro | GPT-5 Pro OpenAI |  DeepSeek-V4-FlashDeepSeek | |
|---|---|---|---|---|
| Vendor | OpenAI | OpenAI | DeepSeek | |
| Family | o-series | Gemini | GPT | DeepSeek |
| Release date | 2025-04-16 | 2025-03-25 | 2025-08-07 | 2026-04-22 |
| Context window | 200,000 tokens | 2,000,000 tokens | 400,000 tokens | 1,000,000 tokens |
| Parameters | — | — | — | 284B (13B active) |
| Modality | text, vision | text, vision, audio, video | text, vision, audio | text |
| License | proprietary | proprietary | proprietary | MIT |
| Source | proprietary | proprietary | proprietary | open weights |
| Description | Reasoning-focused model in the o-series. | Predecessor to Gemini 3 Pro. | 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. | Smaller, faster sibling to DeepSeek-V4-Pro. Same 1M context window with a much lighter 284B / 13B-active MoE. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | — | 84.1% | — | — |
| GPQA-D | 87.7% | 84.0% | — | — |
| AIME-25 | 88.9% | — | — | — |
| MMMU | — | 72.4% | — | — |
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