>that after that they had no intent to keep those models isolated

"keeping them isolated from each other" =/= "keeping them isolated from the internet". Only the latter is required to prevent a hack, and doing the former might actually hobble its performance. The recent Navier–Stokes proof was done by a team of agents working together. It's entirely unclear why you're focusing so hard on "keep those models isolated". For god's sake if you're using claude code you're using non-isolated models, because it spins up independent subagents to do various tasks, eg. "explore".