Ultium uses pretty standard high nickel batteries. You wont find a huge difference in cobalt content between the major battery producers. Pretty much all of them are pushing cobalt out of their high nickel cathodes but nobody has really managed that yet.
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This page from 2020 has some details on Jltium batteries[0]
I don't know enough to compare to others' with it being proprietary and using less cobolt perhaps making it significant for GM.
Ultium uses pretty standard high nickel batteries. You wont find a huge difference in cobalt content between the major battery producers. Pretty much all of them are pushing cobalt out of their high nickel cathodes but nobody has really managed that yet.