Claude Opus 5.5 vs Kimi K3
| Anthropic Claude Claude Opus 5.5 | Moonshot Kimi K3 | |
|---|---|---|
| Vendor | Anthropic Claude | Moonshot |
| Context window | 1,000,000 | 1,048,576 |
| Max output | 128,000 | 16,384 |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text, image, file | text, video, file, image |
| Output | text | text |
| Released | 2026-09-22 | 2026-07-16 |