Who really controls access to the frontier models that more and more organisations are now building on top of? And what happens the first time one of the parties holding that control actually decides to use it? The past fortnight handed us a partial answer to both, and it is not a comfortable one. It showed how fast the supply can be choked. Anthropic went first Two weeks ago Anthropic released Claude Fable 5, a more tightly governed take on its Mythos model, and bolted on a