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Anthropic | Anthropic | OpenAI | xAI | |
|---|---|---|---|---|
| Vendor | Anthropic | Anthropic | OpenAI | xAI |
| Family | Claude | Claude | GPT | Grok |
| Release date | 2026-04-16 | — | 2025-08-07 | 2025-07-09 |
| Context window | 1,000,000 tokens | 200,000 tokens | 400,000 tokens | 256,000 tokens |
| Parameters | — | — | — | — |
| Modality | text, vision | text, vision | text, vision, audio | text |
| 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 Superseded by GPT-5.5 in April 2026.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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