As you are aware QS is an organization that quantifies the performance of universities across the world and based upon certain categories QS ranks the universities in each category. Of course, on overall score universities are globally ranked as well.

Please find the QS rankings of universities for 2021 in the link below:

https://www.topuniversities.com/university-rankings/world-university-rankings/2021

As expected the first 5 universities with the highest ranking as per QS 2021 results are:

1. MIT (USA)
2. Stanford University (USA)
3. Harvard University (USA)
4. Caltech (USA)
5. Oxford University (UK)