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 o3OpenAI |  Gemini Omni |  DeepSeek-V4-ProDeepSeek | GPT-5 OpenAI | |
|---|---|---|---|---|
| Vendor | OpenAI | DeepSeek | OpenAI | |
| Family | o-series | Gemini | DeepSeek | GPT |
| Release date | 2025-04-16 | 2026-05-20 | 2026-04-22 | 2025-08-07 |
| Context window | 200,000 tokens | 1,000,000 tokens | 1,000,000 tokens | 400,000 tokens |
| Parameters | — | — | 1.6T (49B active) | — |
| Modality | text, vision | text, vision, audio, video | text | text, vision, audio |
| License | proprietary | proprietary | MIT | proprietary |
| Source | proprietary | proprietary | open weights | proprietary |
| Description | Reasoning-focused model in the o-series. | Multimodal Gemini variant introduced at Google I/O 2026 — unified text, image, audio, and video processing in a single model. | 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. | OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | — | — | 84.2% | 85.1% |
| GPQA-D | 87.7% | — | 82.4% | 87.3% |
| HumanEval | — | — | 95.1% | 95.2% |
| Aider | — | — | 80.1% | 85.4% |
| AIME-25 | 88.9% | — | 88.6% | 91.0% |
| LiveCB | — | — | 72.4% | 74.5% |
| MMMU | — | 82.5% | — | 74.1% |
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