Hashcat is the correct answer as it is optimized for password cracking with multi-threading and harnessing the power of GPU processing. It supports a wide variety of hashing algorithms and is highly efficient for performing both brute force and dictionary attacks. Medusa is primarily a network logon cracker, which leverages parallel connection attempts, but it is not specifically designed for leveraging GPU resources for hash cracking. Hydra is often used for cracking login credentials through brute force attacks against remote authentication services, but it also does not specialize in GPU utilization. John the Ripper, while capable of password hash analysis, tends to be less efficient with GPU integration compared to Hashcat, and it is better known for its versatile password-cracking capabilities without a particular focus on GPU exploitation.