What you're describing only applies to security or biotech downgrades. A downgrade related to the model believing that you're doing something related to model development is invisible and silent and internal.
When I reported this, Anthropic sent me an email on Tuesday saying, "You have been approved into the Cyber Verification Program", but it's still downgrading. Is this a bug? What's the point of the Cyber Verification Program if Fable 5 downgrades when you tell it to write secure code?
They've publicly apologised for the invisible PEFT that deliberately makes the model dumb on some tasks. Whether they still do it, or will once again do it in future in more subtle ways, is something we can't verify.
Personally I think they have proven themselves to be the stewards of AI in the same way Exxon Mobil are the stewards of petroleum.
There is in /config "Switch models when a message is flagged" now which can be set to false, but I had no chance to see what happens then, does it just stop or what.
Fable 5 has safety measures that flag messages on most 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. Send feedback with
/feedback or learn more
1. Switch to Opus 4.8
2. Edit prompt and retry with Fable 5