OpenAI has unveiled its latest flagship AI model, GPT-4.1, which, counterintuitively, is positioned as an optimized successor replacing the experimental GPT-4.5. The company plans to retire API access to the compute-intensive 4.5 model on July 14, 2025. While OpenAI highlights GPT-4.1’s strong 90.2% score on the Massive Multitask Language Understanding (MMLU) benchmark – a broad…