AI is not just OpenAI.

Sam Altman invested half a billion in a fusion company and needs people to believe AI requires big datacenters (which is false, but they need to convince the public of that). The trend is making smaller, lighter models that are as capable as the big ones. We do have footprints of Meta models, which are competitive with OpenAI's. We are nowhere near it being an energy problem.

I don’t think there’s a way to decouple current AI usage with its exploititive use under capitalism,

There is. Open source is a non-capitalist movement (technically it is anarchist and communist, despite most people participating in it not calling themselves that) and most models used today, right now, in our world, are open models. They don't do the headlines. I am pretty sure OP used StableDiffusion (the glitches on the panels look like it).

The post-capitalist world is being built today. Don't wait for it like an abstract and distant future society. The seeds of it were planted a while ago, they germinated and the roots are healthy. We should stop stomping on them by pretending they do not exist.