The rankings of the best universities in the world can vary depending on the criteria used for evaluation and the source of the rankings. Some of the most well-known university rankings organizations include QS World University Rankings, Times Higher Education World University Rankings, and Academic Ranking of World Universities (also known as the Shanghai Rankings).

As of my last training data up until January 2022, some of the consistently top-ranked universities globally include:

1. Massachusetts Institute of Technology (MIT)
2. Stanford University
3. Harvard University
4. California Institute of Technology (Caltech)
5. University of Oxford
6. University of Cambridge
7. ETH Zurich (Swiss Federal Institute of Technology)
8. Imperial College London
9. University of Chicago
10. UCL (University College London)

Please note that these rankings can change over time and may vary depending on the specific criteria used for evaluation. Additionally, the “best” university for a particular field of study or research can be different from the overall top-ranked universities. It’s important to consider factors like location, available programs, faculty expertise, and research opportunities when choosing a university. Always do your own research and consider what’s most important to you in your education and career goals.