Kimi K3 vs gpt-5-nano
| Moonshot Kimi K3 | OpenAI gpt-5-nano | |
|---|---|---|
| Vendor | Moonshot | OpenAI |
| Context window | 1,048,576 | 400,000 |
| Max output | 16,384 | 128,000 |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text, video, file, image | text, image |
| Output | text | text |
| Released | 2026-07-15 | 2025-08-07 |