Currently a c6i.32xlarge (128 core, 256 GB) is $5.44/hr, or up to $9.68/hr for an r6id.32xlarge with 1 TB of RAM and 4x1900 GB of NVMe.
Of course, that's not even their biggest instance. For a whopping $109/hr, you can get a u-12tb1.112xlarge with 448 cores and 12 TB of RAM. I really have no idea what you would use that for. Machine learning with neural networks that would put OpenAI to shame?