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 o3OpenAI | GPT-5 Pro OpenAI |  Gemini 3 Pro | |
|---|---|---|---|
| Vendor | OpenAI | OpenAI | |
| Family | o-series | GPT | Gemini |
| Release date | 2025-04-16 | 2025-08-07 | 2026-04-22 |
| Context window | 200,000 tokens | 400,000 tokens | 2,000,000 tokens |
| Parameters | — | — | — |
| Modality | text, vision | text, vision, audio | text, vision, audio, video |
| License | proprietary | proprietary | proprietary |
| Source | proprietary | proprietary | proprietary |
| Description | Reasoning-focused model in the o-series. | 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 flagship multimodal model. Best-in-class for multimodal understanding and agentic / vibe coding workflows. A "Deep Think" reasoning mode is available to AI Ultra subscribers. |
| Links | |||
| Benchmarks | |||
| MMLU-Pro | — | — | 87.1% |
| GPQA-D | 87.7% | — | 88.6% |
| HumanEval | — | — | 96.5% |
| Aider | — | — | 84.8% |
| AIME-25 | 88.9% | — | 92.8% |
| LiveCB | — | — | 76.1% |
| MMMU | — | — | 84.3% |
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GPT-5.6 Sol+
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Qwen3.7-Max+Gemini 3.5 Flash+Gemini 3.5+Gemini Omni+GPT-5.5+
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Mistral Large 2+