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 GPT-5.5OpenAI |  Gemini Omni |  Llama 4 ScoutMeta | Gemini 2.5 Pro | |
|---|---|---|---|---|
| Vendor | OpenAI | Meta | ||
| Family | GPT | Gemini | Llama | Gemini |
| Release date | 2026-04-23 | 2026-05-20 | 2025-04-05 | 2025-03-25 |
| Context window | 400,000 tokens | 1,000,000 tokens | 10,000,000 tokens | 2,000,000 tokens |
| Parameters | — | — | 109B | — |
| Modality | text, vision, audio | text, vision, audio, video | text, vision | text, vision, audio, video |
| License | proprietary | proprietary | Llama 4 Community License | proprietary |
| Source | proprietary | proprietary | open weights | proprietary |
| Description | 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. | Multimodal Gemini variant introduced at Google I/O 2026 — unified text, image, audio, and video processing in a single model. | — | Predecessor to Gemini 3 Pro. |
| Links | ||||
| Benchmarks | ||||
| MMLU-Pro | 87.6% | — | — | 84.1% |
| GPQA-D | 89.4% | — | — | 84.0% |
| HumanEval | 96.8% | — | — | — |
| Aider | 89.7% | — | — | — |
| AIME-25 | 94.2% | — | — | — |
| LiveCB | 78.9% | — | — | — |
| MMMU | 78.4% | 82.5% | — | 72.4% |
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