GPT-5.6 Luna vs chatgpt-image-latest
| OpenAI GPT-5.6 Luna | OpenAI chatgpt-image-latest | |
|---|---|---|
| Vendor | OpenAI | OpenAI |
| Context window | 1,050,000 | — |
| Max output | 128,000 | — |
| Reasoning | Yes | No |
| Tool calling | Yes | No |
| File input | Yes | Yes |
| Input | text, image | text, image |
| Output | text | image |
| Released | 2026-07-09 | 2025-12-16 |