What is the antonym of paragon?

The antonym of paragon depends on the context, as it has two main meanings:

* A perfect example or model:

* Antonyms: flaw, defect, imperfection, failure, substandard, mediocre, inferior

* A person or thing of supreme excellence:

* Antonyms: failure, mediocrity, disappointment, unworthy, worthless, inadequate

So, the best antonym for paragon will depend on the specific meaning you're trying to convey.