This comprehensive study evaluates the performance of OpenAI’s o1-preview large language model across a diverse array of complex reasoning tasks, spanning multiple domains, including computer science, mathematics, natural sciences, medicine, linguistics, and social sciences. Through rigorous testing, o1-preview demonstrated remarkable capabilities, often achieving human-level or superior performance in areas ranging from coding challenges to scientific reasoning and from language processing to creative problem-solving. Key findings include: 83.3% success rate in solving complex competitive programming problems, surpassing many human experts. Superior ability in generating coherent and accurate radiology reports, outperforming other evaluated models. 100% accuracy in high school-level mathematical reasoning tasks, providing detailed step-by-step solutions. Advanced natural language inference capabilities across general and specialized domains like medicine. Impressive performance in chip design tasks, outperforming specialized models in areas such as EDA script generation and bug analysis. Remarkable proficiency in anthropology and geology, demonstrating deep understanding and reasoning in these specialized fields. Strong capabilities in quantitative investing. O1 has comprehensive financial knowledge and statistical modeling skills. Effective performance in social media analysis, including sentiment analysis and emotion recognition. The model excelled particularly in tasks requiring intricate reasoning and knowledge integration across various fields. While some limitations were observed, including occasional errors on simpler problems and challenges with certain highly specialized concepts, the overall results indicate significant progress towards artificial general intelligence. This evaluation not only highlights o1-preview’s current strengths and limitations but also identifies crucial areas for future development, including multi-modal integration, domain-specific validation, and ethical considerations for real-world applications. The findings provide valuable insights into the potential of large language models in numerous fields and pave the way for further advancements in AI research and application.