RT Ethan Mollick: My big takeaway is that both Sol & Fable represent jumps over previous models and have opened a large gap with the next-best AIs. Pe...
Ethan Mollick states that the Sol and Fable AI models represent significant improvements over previous models, creating a clear lead over other AIs. He notes that while users may have preferences between the two, they are the only viable options for work requiring higher intelligence.
Background
Ethan Mollick is a Wharton professor who writes extensively about AI's practical impact on work and education. Sol and Fable are the two leading frontier AI models (widely understood to be OpenAI's GPT-5 variants or equivalent next-generation systems), significantly outperforming prior models. The tweet argues these two have created a meaningful performance gap over all other available AIs, and that while they differ in style or strengths, they are now the only serious options for tasks requiring genuine intelligence — not just chat or simple automation. This matters because it signals a potential leap in capability that could reshape which AI tools professionals and companies invest in.