GPT-5 vs kimi-k2-thinking
| OpenAI GPT-5 | Moonshot kimi-k2-thinking | |
|---|---|---|
| Vendor | OpenAI | Moonshot |
| Context window | 400,000 | 262,144 |
| Max output | 128,000 | 262,144 |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text, image | text |
| Output | text | text |
| Released | 2025-08-07 | 2025-11-06 |