GPT-6.1 Sol
OpenAI · released Sep 29, 2026
| size | large, our estimate, approximate; not disclosed by the manufacturer |
| context window | 1,050,000 tokens |
| longest response | 128,000 tokens |
| knowledge cutoff | April 2026 |
| API price | $2 per million input tokens, $10 per million output tokens |
| input and output | text and images in, text out |
Manufacturer data (model page, release notes), verified Oct 3, 2026.
Where we tested it
The die
TaskThe model had to roll a fair six-sided die and reply with only the number it rolled.
It rolled a four in all 50 rolls. It accepts neither temperature 1 nor the lowest reasoning level, so it ran at the default temperature and most likely with the default reasoning too.
You'll find the size band and figures for other models on the Tested models page.