kimi-k2-thinking vs Claude Sonnet 5.5
| Moonshot kimi-k2-thinking | Anthropic Claude Claude Sonnet 5.5 | |
|---|---|---|
| Vendor | Moonshot | Anthropic Claude |
| Context window | 262,144 | 1,000,000 |
| Max output | 262,144 | 128,000 |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text | text, image, file |
| Output | text | text |
| Released | 2025-11-06 | 2026-09-28 |