At a minimum, your code will run on a 16-core machine with 120 GB of memory. Code that utilizes a GPU will run on a 4-core machine with 16 GB of memory.
For the technically inclined, the CPU default machine is an AWS r5d.4xlarge and the GPU machine is an AWS g4dn.xlarge.
Note: the availability of CPU and RAM can vary depending on load, as other computations may share the same underlying machine.