Grok 4.20 Multi-Agent vs Claude Opus 5
| xAI Grok 4.20 Multi-Agent | Anthropic Claude Claude Opus 5 | |
|---|---|---|
| Vendor | xAI | Anthropic Claude |
| Context window | 2,048,000 | 1,000,000 |
| Max output | 1,000,000 | 128,000 |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text, image | text, image |
| Output | text | text |
| Released | 2026-03-08 | 2026-07-23 |