Batch AI manages the resources by itself, you just need to specify the job, the location of inputs and where to store the outputs. If during the execution of the job you want to see the results, you can use the command:

az batchai job stream-file --job-name myjob --output-directory-id stdouterr --name stderr.txt

Once the job is over, you delete both the job and the cluster using az batchai job delete and az batchai cluster delete commands.