gpt-oss-120b vs GPT-5.6 Luna
| OpenAI gpt-oss-120b | OpenAI GPT-5.6 Luna | |
|---|---|---|
| Vendor | OpenAI | OpenAI |
| Context window | 131,072 | 1,050,000 |
| Max output | 131,072 | 128,000 |
| Reasoning | No | Yes |
| Tool calling | Yes | Yes |
| File input | No | Yes |
| Input | text | text, image |
| Output | text | text |
| Released | — | 2026-07-09 |