The MMLU-Pro benchmark introduces structural enhancements to increase its discriminative power.MMLU-Pro emphasizes multi-step reasoning capabilities and reveals models' problem-solving capabilities.A comparative analysis of GPT-4o Mini and Llama-3.3–70B-Instruct showcases their strengths and cost implications.Llama-3.3–70B-Instruct's superior performance in MMLU-Pro and reduced prompt sensitivity highlights its stronger reasoning capabilities.