GPT pro says 3 to 30x energy release compared to the entire supply chain input for a megaton class weapon.

I trust the argument. You can look into it yourself. Long story short, it is massively energy positive compared to controlled fusion.

I really don’t trust that LLM estimate, they are really bad at that kind of thing but for the sake of argument let’s take that as a baseline.

ITER is supposed to be a 10-20x return on energy provided (10x being a basically guaranteed minimum) which means it may or may not be better depending on the specific bomb design, but it’s not massively better.

People talk about fusion as useless and slow but the current record holder in steady state was first turned on in 1983. It’s not a failure of the underlying technology it’s a near total lack of investment that’s stalled progress. ITER was started under the first Bush presidency and scaled back to a minimum design.