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Anthropic | OpenAI | xAI | Anthropic | |
|---|---|---|---|---|
| Vendor | Anthropic | OpenAI | xAI | Anthropic |
| Family | Claude | o-series | Grok | Claude |
| Release date | 2026-04-16 | 2025-04-16 | 2025-07-09 | 2025-10-01 |
| Context window | 1,000,000 tokens | 200,000 tokens | 256,000 tokens | 200,000 tokens |
| Parameters | — | — | — | — |
| Modality | text, vision | text, vision | text | text, vision |
| 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. | Reasoning-focused model in the o-series. | — | Fast, cost-effective Claude model. |
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