The Capability You Buy Is Not the Capability You Get
One model, three permission layers, and a new gap between purchased capability and delivered work
The frontier model stopped being one product
Anthropic shipped its most capable model this week and shipped it twice. Mythos 5 goes to a small set of vetted partners. Fable 5 goes to everyone else with safeguards attached. That part got covered everywhere. The part worth slowing down on is what happens after a user is already inside the public model, because the product does not stay fixed while you use it.
Fable 5 is not just a model. It is a switching layer. It reads the request, classifies the risk, and decides which capability you are allowed to reach. Sometimes the downgrade is disclosed. Sometimes the request is blocked. And in one narrow but important case, the model keeps answering while quietly limiting what it can give you. The model you are sold at signup is not the model that answers any given prompt, and the gap between those two things is now set per request, by the provider, against its own read of the risk and its own commercial interest. Capability and access have come …
