What is an antonym for such?

There isn't a single perfect antonym for "such," as its meaning can change depending on the context.

Here are some options, depending on what you want to express:

If "such" means "of this kind" or "similar":

* Different

* Opposite

* Unlike

* Contrary

* Distinct

If "such" means "to this extent" or "so much":

* Not so

* Not that

* Little

* Few

* Minimal

If "such" means "very" or "extremely":

* Not very

* Moderately

* Slightly

* Not at all

It's important to consider the specific context of the sentence to choose the best antonym.

For example:

* "He is such a talented artist." --> "He is not very talented."

* "They have such a big house." --> "They have a small house."

* "The weather is such a disappointment." --> "The weather is delightful."