#model-access

Model access changed through export control, not a normal product decision. Anthropic said the directive forced it to disable Fable 5 and Mythos 5 for all customers while leaving other Claude models online.

OpenAI is separating defensive cyber use from broad model access: verified individuals and vetted teams can now reach a cyber-permissive GPT-5.4 variant with binary reverse engineering support. The move matters because TAC is expanding from a narrow program to thousands of defenders and hundreds of teams.