While I agree that anthropic has several communication and PR problems, it doesn't seem like Fable has been shown to offer any advantage here (for cyber offensive capabilities) over the previous state of the art.

I'm not saying all of Anthropic's statements are true, but mythos did seem to find many legitimate security exploits. You should be able to talk about a helpful-only model being released to limited partners while still releasing a very locked down model that doesn't advance the state of the art on these things, and that seems to be what they did.

There's no inherent contradiction to that.