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 o3OpenAI |  Gemini 3.5 |  DeepSeek-V3.1DeepSeek | DeepSeek-V4-Pro DeepSeek | |
|---|---|---|---|---|
| Vendor | OpenAI | DeepSeek | DeepSeek | |
| Family | o-series | Gemini | DeepSeek | DeepSeek |
| Release date | 2025-04-16 | 2026-05-20 | 2025-08-21 | 2026-04-22 |
| Context window | 200,000 tokens | 2,000,000 tokens | 128,000 tokens | 1,000,000 tokens |
| Parameters | — | — | 671B | 1.6T (49B active) |
| Modality | text, vision | text, vision, audio, video | text | text |
| License | proprietary | proprietary | MIT | MIT |
| Source | proprietary | proprietary | open weights | 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. | Large MoE open-weight model. Predecessor to DeepSeek-V4. | DeepSeek's flagship open-weight MoE. 1.6T parameters with 49B activated, 1M-token context, and a hybrid attention scheme (CSA + HCA) that delivers long-context inference at ~27% of V3.2's FLOPs. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | — | 88.9% | — | 84.2% |
| GPQA-D | 87.7% | 91.2% | — | 82.4% |
| HumanEval | — | — | — | 95.1% |
| Aider | — | — | — | 80.1% |
| AIME-25 | 88.9% | 96.1% | — | 88.6% |
| LiveCB | — | — | — | 72.4% |
| MMMU | — | 86.0% | — | — |
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Mistral Large 2maxMax 4 models. Remove one to add another.