kimi-k2-thinking vs gpt-5-nano
| Moonshot kimi-k2-thinking | OpenAI gpt-5-nano | |
|---|---|---|
| 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 | 2025-11-06 | 2025-08-07 |