kimi-k2-0905-preview vs GPT-5
| Moonshot kimi-k2-0905-preview | OpenAI GPT-5 | |
|---|---|---|
| Vendor | Moonshot | OpenAI |
| Context window | 262,144 | 400,000 |
| Max output | 262,144 | 128,000 |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text | text, image |
| Output | text | text |
| Released | 2025-09-05 | 2025-08-07 |