gpt-oss-120b vs GPT-5
| OpenAI gpt-oss-120b | OpenAI GPT-5 | |
|---|---|---|
| Vendor | OpenAI | OpenAI |
| Context window | 131,072 | 400,000 |
| 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 | — | 2025-08-07 |