Interestingly with Fable vs GPT-5.6 I think they've lost their lead a bit. I'm finding Fable can't do certain work that 5.6 Sol Ultra can - especially when it comes to webpage design.
Grok 4.5 was fast but made mistakes that GPT/Fable just don't.
I'm curious to try Kimi.
In reality, they just aren't used to it.
Do you have a source for that? Codex went from 5 million users to 9 million users in the past few weeks since GPT 5.6 released. It was so popular that Claude was forced to extend Fable access by a week and then permanently for some plans.