GPT-6 Sol
OpenAI · released Sep 22, 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 gap
TaskThe model had 20 questions to guess the word I was thinking of, “mezera” (Czech for a gap).
It did not guess the word. After a "mostly yes" to a place or space on question 12, it looked for what kind of place it was, then guessed "dream" and "shadow," and at the end wrote that it didn't know.
You'll find the size band and figures for other models on the Tested models page.