GPT-5.6 Luna vs Gemini 3 Flash Preview
| OpenAI GPT-5.6 Luna | Google Gemini 3 Flash Preview | |
|---|---|---|
| Vendor | OpenAI | |
| Context window | 1,050,000 | 1,048,576 |
| Max output | 128,000 | 65,536 |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| File input | Yes | Yes |
| Input | text, image | text, image, video, audio, file |
| Output | text | text |
| Released | 2026-07-08 | 2025-12-17 |