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OpenAI | xAI | Meta | ||
|---|---|---|---|---|
| Vendor | OpenAI | xAI | Meta | |
| Family | GPT | Grok | Gemini | Llama |
| Release date | 2025-08-07 | 2025-07-09 | 2025-03-25 | 2025-04-05 |
| Context window | 400,000 tokens | 256,000 tokens | 2,000,000 tokens | 10,000,000 tokens |
| Parameters | — | — | — | 109B |
| Modality | text, vision, audio | text | text, vision, audio, video | text, vision |
| License | proprietary | proprietary | proprietary | Llama 4 Community License |
| Source | proprietary | proprietary | proprietary | open weights |
| Description | OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026. | — | Predecessor to Gemini 3 Pro. | — |
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