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 GPT-5 ProOpenAI |  Grok 4xAI |  Gemini 2.5 Pro | Gemini 3 Pro | |
|---|---|---|---|---|
| Vendor | OpenAI | xAI | ||
| Family | GPT | Grok | Gemini | Gemini |
| Release date | 2025-08-07 | 2025-07-09 | 2025-03-25 | 2026-04-22 |
| Context window | 400,000 tokens | 256,000 tokens | 2,000,000 tokens | 2,000,000 tokens |
| Parameters | — | — | — | — |
| Modality | text, vision, audio | text | text, vision, audio, video | text, vision, audio, video |
| License | proprietary | proprietary | proprietary | proprietary |
| Source | proprietary | proprietary | proprietary | proprietary |
| Description | 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. | — | Predecessor to Gemini 3 Pro. | 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 | — | 82.8% | 84.1% | 87.1% |
| GPQA-D | — | 87.5% | 84.0% | 88.6% |
| HumanEval | — | — | — | 96.5% |
| Aider | — | 72.5% | — | 84.8% |
| AIME-25 | — | 86.1% | — | 92.8% |
| LiveCB | — | 65.3% | — | 76.1% |
| MMMU | — | — | 72.4% | 84.3% |
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