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 o3OpenAI |  DeepSeek-V3.1DeepSeek |  Gemini 3.5 Flash | GPT-5 Pro OpenAI | |
|---|---|---|---|---|
| Vendor | OpenAI | DeepSeek | OpenAI | |
| Family | o-series | DeepSeek | Gemini | GPT |
| Release date | 2025-04-16 | 2025-08-21 | 2026-05-20 | 2025-08-07 |
| Context window | 200,000 tokens | 128,000 tokens | — | 400,000 tokens |
| Parameters | — | 671B | — | — |
| Modality | text, vision | text | text, vision, audio | text, vision, audio |
| License | proprietary | MIT | proprietary | proprietary |
| Source | proprietary | open weights | proprietary | proprietary |
| Description | Reasoning-focused model in the o-series. | Large MoE open-weight model. Predecessor to DeepSeek-V4. | Fast, low-cost tier of the Gemini 3.5 family announced at Google I/O 2026. June 2026 update added native computer-use capability, moving Flash from generation to agentic task execution. | 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. |
| Links | ||||
| Benchmarks | ||||
| GPQA-D | 87.7% | — | — | — |
| AIME-25 | 88.9% | — | — | — |
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Mistral Large 2maxMax 4 models. Remove one to add another.