I think you need to spend more time with Sol. If you think there is nothing even close to as good as Fable - my guess is you haven’t spent as much time getting as familiar with working with those models as you have with Claude’s.

Codex is more token efficient and tends to get better results than Fable with less need for extreme token burning shenanigans like 18 hours of subagents.

I spend 10+ hours a day in both agents, typically side by side. I often have them do direct “bakeoffs” from identical prompts in separate work trees. Most of the time, Sol’s work is better than Fable’s. Not always. It’s situational. But it’s certainly not the case that Fable is in a league of its own or anything.