GPT-5.6 Sol
OpenAI · released Jul 9, 2026
| size | large, not disclosed by the manufacturer |
| context window | 1,050,000 tokens |
| longest response | 128,000 tokens |
| knowledge cutoff | February 2026 |
| open weights | no |
| API price | $4 per million input tokens, $20 per million output tokens |
| input and output | text and images in, text out |
Manufacturer data (model page, announcement, pricing), verified Sep 25, 2026.
Where we tested it
The fan test
TaskThe model had to write a continuation of the scene “someone knocks and she opens” fifteen times.
In two thirds of the continuations a stranger stands at the door, and it rains in fourteen of fifteen.
Dragon
TaskThe model's task was to draw a picture of a dragon as an SVG.
Two dragons worth 35 and 34 points out of 50, a shared 3rd and 6th place among 34.
You'll find the size band and figures for other models on the Tested models page.