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xAI | Anthropic | OpenAI | ||
|---|---|---|---|---|
| Vendor | xAI | Anthropic | OpenAI | |
| Family | Grok | Claude | GPT | Gemini |
| Release date | 2025-07-09 | 2026-04-16 | 2025-08-07 | — |
| Context window | 256,000 tokens | 1,000,000 tokens | 400,000 tokens | 1,000,000 tokens |
| Parameters | — | — | — | — |
| Modality | text | text, vision | text, vision, audio | text, vision, audio |
| License | proprietary | proprietary | proprietary | proprietary |
| Source | proprietary | proprietary | proprietary | proprietary |
| Description | — | Anthropic's most capable model, optimized for complex reasoning and coding. Improved software engineering, long-running coding tasks, and higher-resolution vision over Claude 4.6. | OpenAI's flagship general-purpose model. Superseded by GPT-5.5 in April 2026. | — |
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