OpenAI GPT-5 Mini Performance Review: Small Model, Big Capabilities, 90% Price Drop

OpenAI has launched GPT-5 Mini, which achieves 90% of GPT-4o's performance on mainstream benchmarks like MMLU and HumanEval, while reducing API call costs by over 90%. For high-volume call scenarios, this model could become the mainstream choice in the second half of 2026. Feedback from major developer communities has been quite positive, with many praising it as 'good enough to use.'