Post by Ethan Mollick on X
Ethan Mollick@emollick
XI was an early tester of GPT-5.6 Sol. I was asked to not share demos until after launch but it is a very good model.
It is of similar ability, but quite different feel, than Fable. Fable wants to go off and do work on its own pace, Sol is faster but works with you in steps more.
3.7K likes108 repliesPosted Jul 8, 2026