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xAI | Anthropic | OpenAI | Anthropic | |
|---|---|---|---|---|
| Vendor | xAI | Anthropic | OpenAI | Anthropic |
| Family | Grok | Claude | o-series | Claude |
| Release date | 2025-07-09 | 2025-10-01 | 2025-04-16 | — |
| Context window | 256,000 tokens | 200,000 tokens | 200,000 tokens | 200,000 tokens |
| Parameters | — | — | — | — |
| Modality | text | text, vision | text, vision | text, vision |
| License | proprietary | proprietary | proprietary | proprietary |
| Source | proprietary | proprietary | proprietary | proprietary |
| Description | — | Fast, cost-effective Claude model. | Reasoning-focused model in the o-series. | — |
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