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