Are launch costs really 10x!? Could I get a source for that?

In the back on my head this all seemed astronomically far-fetched, but 5.5 million to get 8 GPUs in space... wild. That isn't even a single TB of VRAM.

Are you maybe factoring in the cost to powering them in space in that 5 million?

I guess he adds the weight of all the hardware to make the whole thing work.

You also need square kms of radiators to cool 100MW