Banco De La Nacion is the best option. In March 2019 it was charging 230 ARS (~5 USD) for withdrawal.
Withdrawal limit: 4000 ARS. Try withdrawing 3800 or similar if the ATM refuses to give 4000.
All other banks charge 10 USD or more for an international credit card ATM withdrawal.
Also, Banco De La Nacion is probably the only bank where you can exchange foreign currency to ARS.
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Last update: May 10, 2019