Grok 4.20 (Non-Reasoning) vs Claude Sonnet 5.5
| xAI Grok 4.20 (Non-Reasoning) | Anthropic Claude Claude Sonnet 5.5 | |
|---|---|---|
| Vendor | xAI | Anthropic Claude |
| Context window | 2,000,000 | 1,000,000 |
| Max output | 2,000,000 | 128,000 |
| Reasoning | No | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text, image | text, image, file |
| Output | text | text |
| Released | 2026-03-09 | 2026-09-28 |