I didn't notice any difference at all. Every time it might have been amazing for me I was reverted to Opus:
Innis
Fable 5’s safety measures flagged this message for cybersecurity or biology topics. They may flag safe, normal content as well. These measures let us bring you Mythos-level capability in other areas sooner, and we’re working to refine them. Switched to Opus 4.8. Send feedback with /feedback or learn more
Oh well, that was fun while it lasted...
lesson learned: if you market your product as a potential super cyber-weapon that is too dangerous for the masses, don’t be surprised if it gets hit with export controls.