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 GPT-5.5OpenAI |  Llama 4 ScoutMeta | GPT-5 OpenAI |  Mistral Large 2Mistral | |
|---|---|---|---|---|
| Vendor | OpenAI | Meta | OpenAI | Mistral |
| Family | GPT | Llama | GPT | Mistral |
| Release date | 2026-04-23 | 2025-04-05 | 2025-08-07 | 2024-07-24 |
| Context window | 400,000 tokens | 10,000,000 tokens | 400,000 tokens | 128,000 tokens |
| Parameters | — | 109B | — | 123B |
| Modality | text, vision, audio | text, vision | text, vision, audio | text |
| License | proprietary | Llama 4 Community License | proprietary | Mistral Research License |
| Source | proprietary | open weights | proprietary | open weights |
| 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. | — | OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026. | — |
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