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 o3OpenAI |  Gemini 3 Pro |  Llama 4 ScoutMeta | GPT-5.5 OpenAI | |
|---|---|---|---|---|
| Vendor | OpenAI | Meta | OpenAI | |
| Family | o-series | Gemini | Llama | GPT |
| Release date | 2025-04-16 | 2026-04-22 | 2025-04-05 | 2026-04-23 |
| Context window | 200,000 tokens | 2,000,000 tokens | 10,000,000 tokens | 400,000 tokens |
| Parameters | — | — | 109B | — |
| Modality | text, vision | text, vision, audio, video | text, vision | text, vision, audio |
| License | proprietary | proprietary | Llama 4 Community License | proprietary |
| Source | proprietary | proprietary | open weights | proprietary |
| Description | Reasoning-focused model in the o-series. | 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. | — | OpenAI's smartest and most intuitive model — successor to GPT-5, with major coding, research, and document workflow gains. GPT-5.5 Pro variant also available for heavier reasoning. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | — | 87.1% | — | 87.6% |
| GPQA-D | 87.7% | 88.6% | — | 89.4% |
| HumanEval | — | 96.5% | — | 96.8% |
| Aider | — | 84.8% | — | 89.7% |
| AIME-25 | 88.9% | 92.8% | — | 94.2% |
| LiveCB | — | 76.1% | — | 78.9% |
| MMMU | — | 84.3% | — | 78.4% |
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